The darkest Sesame Street skit I ever saw had a muppet jumping up and down on a manhole cover, gleefully repeating "99! 99! 99! ...". A second muppet shows up wondering what it's all about, and the first muppet concedes his spot. The second jumps up once, saying "Ninety---", the manhole cover slips out of place, and the muppet falls to its doom. The first resumes his jumping: "100! 100! 100!"