Say you threw your hand out to regain your balance and hit the windshield.
Its entirely plausible... just emphasize how the guy cut you off, etc. And if you know the other cyclist try to get him to corroborate. I know its stupid but I don't take any crap from anyone in traffic... I would have done the same thing probably... though I usually take a flat hand to a fender or something since I'm always nervous about glass breakage... that reminds me... TOE SPIKES are great for road riding
