Maybe this should have been the volvano of gunk, because it sure erupted.
This poor guy apparently suffered from an infected abscess in his armpit. I don’t know how it got there, and I don’t really want to know.
But I think I’m safe to say the person doing the popping is not a doctor, and the people around him are going back and forth between enjoying the goo and being grossed out.
The latter seems to be the most appropriate.