because he had no knees
Britney Spears
Their knee.
A crowbar.
Kid:Don't poop your pants M:I was gonna say "have fun" but...OK.
When you wake up in the morning with an erection so stiff, that when you bend it down to take a leak, your legs kick back and you hit your head on the toilet.
Dough-nuts (South Park reference again just spreading it).