Spenny bit off a piece of Kenny's toenail.
In this episode about standing on your feet, Spenny was tasked with biting the toenails of Kenny, until he had a delicious morsel.
Kenny put itching powder on Spenny's standing spot, causing Spenny to leave his position.
16th Sep 2003 / Season 1 Episode 10
Kenny used various contraptions to aid his standing; it was debated throughout the show whether this was cheating or not. There was also a lack of agreement as to whether leaning was classed as standing. In a final stand-off in which both Kenny and Spenny had to stand in one spot for as long as possible, Kenny put itching powder on Spenny's standing spot, causing Spenny to leave his position.
Endurance competitions entail lasting longer than the other guy. They include competitions when the other guy might get caught or break a rule first, as they didn't endure longer.