Oh - I suspect you had very little to do with what he was thinking. Bad day, too much traffic, cranky boss, wife not... well ya know - w/e it may have been you were there to take out some angst on.
Little did he know you weren't the easiest target around lol Honestly, some of the spite could easily have been envy - stuck in his cage, late for w/e and there you were, enjoying a lil cruise on yer bike.
How DARE you have the audacity to be enjoying yourself? omg - the gall of some ppl