My DH is a cunt when he's stressed. Be it work, money or whatever, he turns into an argumentative manchild. Constant PMS-style emotional outbursts, picking arguments about insignificant things, defensive, paranoid, sulking, flouncing.
Fortunately, it doesn't happen often. But when it does (like at the moment), I'm walking on eggshells and being around him is a tense experience.
What's your bloke like when he's under stress? Does he bring it home?