Back in vanilla, I farmed all night for fire resist mats for the MC raid later the next day. During the raid, we took a 10 minute break. Whilst people were smoking, going to the bathroom, or whatever-- I fell asleep and manage to hit auto run in process. I aggro'd a ton of mobs and wiped everyone. Since they were a "serious" raiding group, I got kicked out of the raid and later kicked out of the guild due to me getting angry over it.