Not necessarily the most spectacular but the most satisfying. Mine was when I was a teenager. I had a tingle in the philtrum above my lip that I could tell a zit was brewing in there. Outwardly there was no sign of it - the skin looked perfectly normal. It was the kind of vague unformed early zit pain that, nine times out of ten, if you squeezed it at that point all it would do would inflame the skin and make the eventual spot worse. Anyway on this occasion, despite knowing that, I squeezed the area anyway and instantly this perfect streak of pus leapt out of my skin and splattered across the bathroom mirror. And that was it done. No sign it had ever been there. No irritated skin. No residual soreness. Just a very polite zit that burst cleanly at the first prompting.