Blasted the horn for no discernible reason - think I wasn't tailgating the van in front close enough as he was turning off. Then sat on my bumper as I was leaving a 30. Camera doesn't do it justice, but when you have a face as wrinkled as an old man's ballsack, I suppose you would be angry at life!
Typical tailgating bully in a BMW - i'm already doing the speed limit so why be impatient?