So this morning I had an incredibly frustrating experience while dropping the siblings at school. It's insanely congested when I drive up there (London ftw...) and parking is scarce. If it has been raining or something like it had been this morning, traffic seems to double and usually this means that parking spills over to another residential road. I park across the partition of two driveways. Awkward but people can enter/exit their driveways and besides I'll be literally 2 minutes. I walk back to the car after walking the siblings to the gate and some guy is trying to parallel park his mini-van in front of my car. I unlock from a distance so maybe he'll see the lights and realise that I'll be there in a minute to move it, but he just pulls out and reattempts to park. THIS attempt, the corner of his bumper knocks into mine. Now I'm annoyed and almost next to the car, but I can't see any apparant damage. The driver opens his door and I say that I was just about to move the car and he'd knocked into me. He then says that I was blocking his drive. I notice he has kids in the back. I'm not going to shout at a guy with young children. I'm not going to get an apology out of this guy, and there is no damage to either car. I walk away. Now I feel ****ing stupid because I should have taken down details. What should I have done?