I had my fighter <i>dominated</i> by a vampire at GenConUK. It was the last day of the Con, so everyone was a bit sleep deprived. I killed the other member of the party in the room with me (a halfling) and then made my way back to the rest of the group.
In the first round back, the vampire Dominated the Barbarian, and told me to attack everyone. I asked the DM if I knew the Barbarian was under control too, and he said no. So I attacked him, because I thought he was the biggest threat to me.
The vampire got a bit cross, mostly when the Barbarian attacked me back. So then he told us to stop, and then attack everyone else, whilst dominating the Cleric. I couldn't believe the DM had made the same mistake twice, so I attacked the Cleric, because the two thieves were hiding!
Eventually the DM Vampire sorted us out, we slaughtered one thief but the other was running away into a dark area. The vampire shouts "Find him!"
So the Cleric casts <i>Daylight</i> on his dagger, in order to be able to see the Rogue better...
At this point the Vampire gave up on us as hopelessly useless, and assumed gaseous form and left, leaving most of the group in hysterics.