While watching The Itchy & Scratchy Show Bart and Lisa notice their TV begin to show distortion. Getting some tools (and a chainsaw) to fix it, they return and see Itchy and Scratchy literally leap from the screen and into the living room. The pair trash the room and escape, leave holes in their shape in the wall. Naturally Homer and Marge assume Bart did the damage, and despite Lisa's protests ground him from attending a public appearance of Krusty the Clown.