What was your WORST admin encounter ever?

A lot of admins can be annoying, but some take it way to far. What was your worst encounter with an admin on any gamemode?

Sandbox. We were having a Deathmatch on a small map and the admin was using an admin gun (The Sexiness). Me and 2 of my friends started to snipe him from various locations in the map and he could not kill us before getting shot. He turned on rapid fire and unlimited ammo, noclipped into the sky, and started firing the Davy Crockett until the server crashed around 10 seconds later.

I played on one server and there the admin did what he wants. If he did not like the man visually, then he baned him.