Starring: Tom Kenny, Colin Hanks, James Adomian
The Contest - S1-E24
Other mistake: When Tom unzips the backpack to collect everyone's devices, he adds a few devices that belong to Ben, and as Tom drops in sneaky Ben's last device, watch as the backpack zips itself shut mid-shot, all on its own. (00:04:32)
Fancy Party - S3-E12
Continuity mistake: Tom wears a glow tie; however, right after the scene when Hank and Ginger are brushing elbows, when Tom says, "You guys are too immature and silly for a Fancy Party!" his glow tie is gone, and then it reappears.