No, not a sitcom, but a real life story of a welder...
You'd think a professional wouldn't make silly mistakes-- but it happens. A video has surfaced that shows a welder accidentally trapping his head between railings while attaching a new metal bar. The short clip shows him poking his head under the top bar, not realizing he'll get trapped. Luckily a saw is within his reach and he is able to cut himself free. It's unknown where the video was taken.