He's not looking where he's going, which is why he ends up backing right up into someone else, cursing the whole time he does. He's been cursing at someone because he wound up having to be honest with them about what he thought of their idiot pants, but now he's narrowly avoided a fight (not a good start to today) and ended up colliding with someone because he wasn't looking (worse continuation).

Grimacing, he turns to find a somewhat familiar face, though maybe not entirely with the hair the way it is. "Sorry," he says, brusque but sincere enough. "I wasn't exactly looking where I was going." Irritably, he curses the plaid, awful trousers that had made him nearly use his lasso on someone, but who goes out in public willfully looking so awful? Also, why is this rain making him so loose with his opinions?

That's something even more to worry about.