I used to work in Clapton, East London. I was walking towards Hackney Downs during my lunch break with a portion of chips. A bloke was arguing with a woman. I assumed they were a couple, but might not have been. As they  passed me in the opposite direction, the bloke punched me in the arm. Fairly hard, and for no obvious reason. When I asked him why he’d done it, he got surprisingly timid for a man who’d just just assaulted a stranger in broad-daylight. Apparently I was about to walk into the lady, who’d never been closer than 5 meters away from me and had since taken the opportunity to escape. Then he walked off. It was a very odd encounter. I thought about it while I ate my chips.