It was nothing to do with them being Asian - he was just nuts. The four shoppers had no idea what to make of it - they were as confused as everyone around them, including me.
The nutter stood there and urged them to fight him for a few seconds, then walked off. So did I.
A minute later, I was waiting at a spot for a colleague. I spotted the nutter coming towards me. If I hadn't known he was psycho, I wouldn't have picked him out from the hundreds of other normal looking people in the mall as being nuts. But as he got closer, I could see that his mouth was working hard, and he was talking to himself and working up for another daft encounter with some innocent strangers. I don't know if that was his natural temperament, or whether he had ingested something that made him that way. He went past me, muttering under his breath about "beating the fucking eyeballs out of some c*nt's head - har har har", turne left and disappeared into a shopping arcade.
Whatever his problem was, he was completely off his rocker. I'm used to seeing winos wandering around with the arse hanging out of their pants, harmlessly talking to people that aren't there and generally not bothering anyone or anything. This bloke was in another league though - he was going out of his way to assault people. Probably not seriously enough to get arrested, but certainly nastily enough to ruin your whole day.
I bet he drives a ute.