Joseph Gordon-Levitt Teaches Us About 'Reinforcing' On 'Sesame Street'

Sometimes we like to imagine that we live in a wonderful world where the ultimate source of validation for an actor is to be featured on a "Sesame Street" segment. Yesterday, that version of reality seemed a little bit truer thanks to an appearance from Doer of No Wrong, Joseph Gordon-Levitt on the children's show.

Young Bruce Willis teamed up with Murray to teach us all a lesson about the word "reinforce." They played out a scene in typical, lovable "Sesame Street" fashion with Joe trying to prove a point about the word but also protecting his beloved watch. Classic.

Click past the jump to see some of our other favorite celebrities on "Sesame Street."

Amy Ryan

Raylan Givens

Maya Rudolph

Ed Helms

Ellen DeGeneres

Casey Affleck