[dpmdpm]

Reminds me of the first time my DnD group tried out roll20.net. The chat box allows players to type things like "/roll 1d6" or "/roll 2d12" to simulate rolling dice (in these cases 1 6-sided die and 2 12-sided dice). I quickly tried "/roll 1dNaN", crashed the chat, and we went back to physical dice for the rest of the session.

[kevincox]

Also fun is `/roll 9999999999d2` which IIRC Roll20 blocks but many virtual tabletops just hang on.