The guys head out to sea in a fishing competition. Spenny claims to be the better fisherman, but Kenny wants Spenny to be the catch of the day.

Armed with gas masks the crew is forced to record perhaps the smelliest competition to date. Kenny, the fart-maestro, is shocked to find out that Spenny's gas-inducing diet is making him competitive. So, Kenny must dig deep to into his bag of tricks (and bowels) in order to win this methane-filled contest.

The boys see who can wear a dead octopus on his head in this brutal endurance competition. Both guys lose their minds as a rotting corpse stinks up their scalps…one more than the other.

The guys compete to see who can drink more beer - and puking means disqualification! Since Spenny's a much more experienced boozer, he's sure he has this one in the bag.

Possessing a natural criminal mind, Kenny tries to break every law in the book, while Spenny tries to commit politically correct crimes and unleash his inner criminal.

The boys are each tethered to a live goat. The first one to break the bond loses. Kenny, who wants to have fun with his goat, cleverly uses an extremely long rope in hopes that Spenny will be stuck taking care of both goats. Spenny tries his best to toilet train his goat and keep him smelling as pleasant as possible. Though it's not easy, the goat is still a better roommate than Kenny.

The guys split the van front/rear, with the first to leave the van losing. Kenny equipped the back of the van with a television, stove and other equipment, while Spenny drove and stayed in the front seat. After several days, growing tired, Spenny agreed to switch places, secretly taking the keys with him. However, Kenny had made a duplicate key, planning to drive dangerously to make Spenny leave the van. Kenny's plan backfired as his electric equipment had drained the battery and the van could not be started or boosted.

Kenny and Spenny compete to see who gets a boner first. They both put on speedos and throw whatever tactic they can at each other. Spenny brings his cousin Bianca in a bikini to Kenny's room and try to arouse him while Kenny tries to get Spenny so frustrated that the blood rushes to his genitals. That fails but Kenny gets an injection that stops him from getting a boner for a week.

After a season of competing, the boys decide to punch out their mutual frustration with each other in the squared-circle. Are best friends really capable of beating the crap out of each other? Watch as tensions explode in a most surprising and sadistic season finale.

When Kenny and Spenny see who can go longer without wearing any clothes, Spenny tries to overcome his shame of being naked, while Kenny goes all-out in a bid to maximize his friend's embarrassment and discomfort.

The boys see who can produce the most semen in a week. Kenny, knowing that Spenny is a master of masturbation, must do something drastic to stop him!

Hold on to your stomachs for an all-you-can-eat carnivorous bloat fest: whichever guy eats more meat is the winner. Kenny, a pig by definition, summons the gluttonous gods and gorges like never before, while Spenny chooses the more methodical approach of eating, exercising, resting and moving his bowels.

The boys will be strapped to each other in the 69 position -- the first guy to unstrap himself loses. With almost zero mobility the crew gets bored with them and the competition takes some unexpected turns.

The first one to fall asleep loses. Without stimulants Spenny feels he can outlast the lazy Kenny but Kenny is chugging coffee because he’s highly motivated by the prospect of eventual hallucinations.

The rules are simple: the first guy to say a word loses; grunting is allowed. Spenny tries to take advantage of the fact that Kenny talks in his sleep. Can Kenny abuse Spenny without talking?

Doing his best to make Spenny laugh, Kenny engages in an outrageous barrage of funny costumes and ridiculous characters. Thinking defensively, Spenny tries to plunge himself into a deep depression and existential crisis.

Qigong is the ancient contest of genital weightlifting. Spenny and Kenny stretch their genitals to the extreme. But, unfortunately, both guys have more to worry about than hernias.

Whoever can take the most pain wins. Spenny, in order to get motivated, dedicates his performance to his late father, while Kenny becomes not only a competition participant but also the torturer.

It’s diapers, bottles and late night feeding as the boys get life-like, state-of-the-art computer chip babies. The data is measured and whoever has taken the best care of their baby is the winner.

Wearing white body suits, the boys put themselves through numerous high-rish stain situations in an effort to stay as stain-free as possible. After a few false starts, Kenny's character is more stained than the guys' suits.

The guys put on 80 pound weights, and the first one to take them off loses.

The boys decide to give up all the comforts of home and see who can stay homeless the longest. Will Spenny survive without his hand sanitizer and sunscreen, or will Kenny’s lack of coffee and videogames give Spenny the edge?

Eight women spend some sexy time with Kenny and Spenny who do everything in their power to get as much sex as possible off them. Spenny's arousal theory is put to the test while the ever confident Kenny is more focused on what he hopes would be Spenny's worst humiliation to date.

In perhaps the silliest competition to date - if that's even possible - the dysfunctional duo wear hot and itchy gorilla suits in the middle of summer - the first one to take off any part of the costume is the loser. Spenny's strategy is to ignore the costume and be himself while raising awareness of the fate of the mountain gorilla, while Kenny devolves, finding his inner gorilla, and does his best to put gorilla Spenny into extinction.

In this brutal endurance competition Kenny is at a disadvantage, Spenny is a runner, but that's not the reason why this competition turns out to be a disaster.