Here are a couple of the most damaged ones ...
Winner of the second heat in black and yellow (And yes, that started out as a full-size bus):
A really nicely painted bus that didn't survive the third heat. It couldn't be towed or pushed, as the rear of the body had broken loose from the chassis. You get a little of that here where it's being carried off:
And we had the obligatory engine-fire during the final heat's 'free-for-all' when the front of the buses could be targeted: