Again, thanks for the replies!
Upon my username: More an odd happening than anything else. As my scrawl is practically unreadable, it doesn't make much sense that I hand out notes all the time. Any note from anyone in my group cues a few moments of puzzled silence as we make our Decipher Script check.
Anyway, one of my notes was something like the bad guy of the moment (A vampire) had tried to dominate one of the PC's, but the PC had got away. The PC on the other hand had misunderstood and thought that he had not suceeded, and must lead the PC's to the awaiting trap.
So he did. Under no domination effect. I assumed he had a plan. Unfortunately, he did not. When they finally got out of it (Lots of pretending to roll low) I questioned him about it and found out he thought he was dominated the whole time. Turns out he had read the opposite side of the paper twice and got two different messages from it.
Cue lots of frustrated "Arrgh! Mark!" from the people who had their character die.
Anyway, I'll have to wait till we play on sunday to see how he goes. If he keeps up the vicious aggressive insulting, the character dies - or he makes another. Or he leaves. To be honest, his character has a lot of potential, which is the problem.