I had a “whoa” once, or perhaps something slightly more extreme. The condition wasn’t, particularly - I had a lump on my finger as a kid. The first doctor said it would go away on its own, which it didn’t at all, 2 years later it was much worse and started to hurt, so back we went. The next doctor suggested basically that we just cut it open and see what it was lmao, so that we did. He sliced it with a scalpel there and then, while, me, the doctor, and my dad peered at it.

As soon as the scalpel went in there was a small explosion of goo from in there and both my dad and the doctor recoiled in horror (“whoa!” lol). He proceeded to poke around in the goo hole somewhat with a needle (looking back this seems like an odd way to do things) and fished out a ~inch long hawthorn that had just been in there, chilling for the past 2 years.