[Larry Mal]

If you want to do it, get together with this person and have a good, long talk about why you're having reservations about this (although it seems obvious to anyone). Under no circumstances is that acceptable, and you should make it very clear that it isn't, and you'll cease your part of the job as soon as anything like it happens.

I'd also try and get as much money in advance as you can, and make sure that you have a contract drawn up that gives the the ability to keep it even in the event that you have to stop working on the project at any point.

If this seems harsh and unfair to this character, well, that's why making physical and other threats doesn't work in the real world. Now is as fine a time for him to learn that as any, since he missed it when he should have in fifth grade.

But that's what I would suggest, clear the air, and cover your ass. Nothing is more clear than simply saying, "I'm not putting up with even a second of that, and as soon as it happens I'm taking my advance and calling it a day. Otherwise, you'll have the good employee that you've had in the past, so it's really up to you."


Edit: Or, what I now see that Psycho Monkey has said. I would say if anybody is probably in the know about this sort of thing, it would be someone named "Psycho Monkey". I'd listen to him.