No. He's usually a lot of fun. However, if he starts talking about ammonia, that's a clue he may become violent.
8 seconds sound clip from the The A-Team - Mexican Slayride (Season 1, Ep. 1-2) TV Series.
You can hear this line at 00:19:42 in the DVD version of the movie.
Quote context
[...]
- I have a hunch this Murdock character isn't anywhere near as crazy as he pretends.
- He's not faking. Mr Murdock has paranoid anxiety delusions and intermittent memory loss.
- Be that as it may, I'm gonna press him hard and see what happens. That won't snap him, will it?
- Violent?
- Hardly ever happens. But watch out. It's a trigger word for his aggressive cycle.
- Ammonia?
- Where's my dog Billy? You seen my dog?
- What you doing, man? Step off! Step off!
[...]