Joseph Gordon-Levitt "Reinforces" Vocabulary on Sesame Street

Though he”s just sold his latest very adult movie about a porn addict at the Sundance Film Festival, Joseph Gordon-Levitt brought out his kid-friendly side for a vocabulary lesson on “Sesame Street.”

The “Looper” star joins a friendly red puppet named Murray to explain to viewers the meaning of the word “reinforce.”

Putting his beloved watch at the mercy of a mallet-wielding Muppet, the 31-year-old frantically comes up with new ways to protect (or reinforce) his watch.

Find out if Joe”s watch survives in the video below and mature fans can look for “Don Jon”s Addiction” to hit theaters later this year.