i waved at the guy in the car next to me! and it was a big happy cheerful I-love-you-and-isn't-america-great kind of wave.
the reason for all this joyful waving? the guy in the other car was waving at me! and i thought what a lovely man! he's waving even though we don't know each other!
that's when i realized he wasn't technically waving at me. technically he was flipping me off.
obviously i did something to anger him. cut him off unawares, perhaps?
i can totally promise you this. my waving at him with a big dopey grin on my face probably made him even madder.