I think it's an old trauma inducing video from early Internet days where a man attempts to fit a jar into his butt, only to have it break in the attempt. It's really utterly horrifying, but I'll admit to laughing at the reference here.

It's a shock video called 1 guy 1jar.

He sits on it, it goes inside him, then shatters.
He then starts to pick the pieces of glass out of himself, while bleeding everywhere.

Hollow and glass, keep away from your ass.

Warm