S3·E4 Rock Hard Chett

When Chett almost gets struck by a bolt of lightning, Lisa makes Chett invincible to save him. Now, nothing can harm Chett, not even the fact that he was electocuted, run-over, and shot. Gary and Wyatt get Chett to use his powers for good, so Chett becomes the super hero, the Star-Spangled Butt Kicker. Chett works at helping to put a stop to crime. However, trouble occurs when his powers wear off while he's trying to stop some homicidal maniacs.