Probably a bit of “fuck you lot for smashing up my car”. Clearly totally in the wrong.
Obviously the right thing to do, once stuck in that situation, is to stop and wait it out. But, regardless of him taking a number of escalating bad choices, I can see that being in a car in a crowd that big would be fucking scary. I always felt sorry for the unsuspecting idiots who used to turn down trentside just before the final whistle before they started blocking it off.