Your unprovoked display of macho aggression on that poor cyclist must have been the result of you spending some time at the UWE campus. I found myself all aggressive and hard as nails when I last went there. It lasted for about 12 hours.
I agree - a very strange phenonema it seems. On my way there I was thinking... 'very worried about the students making fun of my lycra tights' (sexy black, not the comedy ones) but once within visual range of the campus it changed to 'the first person that says anything gets a punch in the face! My fist, your face that's where it's going. Yeah, there you go, yeah'.
Maybe you should pop in on the way to o-ing events. It might help you run more aggressively.