The Sideshow Bob couch gag is the eleventh couch gag of Season 16.
The Simpson family enters the living room and sit on the couch as usual. "Homer" then pulls off his face (which is a latex mask), revealing to be Sideshow Bob, much to Bart's horror. Bob pulls out a knife and chases Bart around and out of the living room, knocking over the TV in the process, as Marge, Lisa and Maggie hug each other and watch in worry.
- Robert Terwilliger
- Homer Simpson (disguised by Sideshow Bob)
- Marge Simpson
- Bart Simpson
- Lisa Simpson
- Maggie Simpson
- Episode – "Mobile Homer"
- Episode – "At Long Last Leave" (Snapshot montage with other episode's gags)
- Some airings of "Mobile Homer" use an alternate version of this couch gag where after Sideshow Bob gets his knife out, Bart starts to panic and runs out of the room with no chase happening.