On another occasion one of my mates cut his hand pretty badly trying to get the fitting off a light bulb so we could smoke out of it. There was this cartilage type stuff sticking out of the cut and he tried to bite it off, but it just stretched a bit and stuck out some more and he ran off and threw up in the toilet.
When he came back we got him to try again with another bulb and he sorted it and it was cool. I dunno whether it was smoking it out of the bulb or we just didn't properly scrape the coating off the inside, but it def. felt different.