Human Cannonball: Bob gets into the cannon on one of the Mardi Gras floats and lights the fuse in order to launch himself into the air and save Homer from getting Impaled with Extreme Prejudice on one of the swordfish in the swordfish museum.
Jerkass: Homer's friends at the bar actually give Sideshow Bob advice and encouragement to kill Bart.
Sauna of Death: First attempt on Homer's life. He was actually already in danger by being in the sauna at all because of his obesity and heart problems. The sauna controls helpfully included the setting "murder".
Why Don't You Just Shoot Him?: Sideshow Bob was asked why he doesn't just shoot Bart. He tried it at the end of the episode and it turns out he grew accustomed to Bart's face.