Most epic moment ever:
On sumz's server once he was building a giant lab in a mountain thing, working from the top down. At some point while he was building, everyone was crowding around him, in response, he deleted the baseplate below us and we all fell into the cavern that was the mountain. Everyone turned around in unison to see a giant billboard with the words "forget you sumz". At that point, the person who made the sign just finished painting the "z" and turned around to see us all, Sumz included, staring at him.
The timing of it all was perfect.