I was waiting to make a left. A car was coming from the left, so I waited, as one does. They are going slow but no blinker. The slow some more, still no blinker, and then they slow some more and turn all without an indicator which meant I sat there simply because they were too inconsiderate/lazy (or more likely just stupid) to bother indicating a turn, so they got the up arrow🖕🏼from me.

Why I started laughing two blocks later: I was driving a BMW and flipped someone off for not signaling.

What do I win?