This reminds me of an interaction a month ago or so.

A guy on a scooter was following me while I was on my bicycle heading to the train station. I made a few turns in front of him, using hand signals, him going the same route. We came to an intersection where I was turning left and he was going straight. He stopped next to me, said, "Sweet old school style with the hand signals." and fist bumped me...

I still don't understand how hand signals are "old school." I, by the way, am 28 so it isn't like I'm old or anything.