clowning
Explanation
This single-panel comic shows a little girl watching a clown, with the clown urgently explaining: "It's not a pocket. Those aren't scarves. I'm begging you. We as clowns expel our viscera. Many of those we entertain were in danger."
The caption reads: "The true origin of the infinite scarves trick was later quietly erased from history."
The joke takes the classic clown trick of pulling an endless chain of scarves from a pocket and reimagines it with a body-horror twist: the "scarves" are actually the clown's internal organs (viscera) being expelled from its body. This transforms an innocent children's entertainment act into something grotesque and alarming. The clown is desperately trying to warn the girl that this is not a trick -- it is a medical emergency -- but the audience interprets it as performance.
The humor is characteristically SMBC in taking a familiar, innocuous concept and finding the most disturbing possible literal interpretation of it, then wrapping it in a pseudo-historical "origin story" format.