I have been unlucky enough to have been caught in a few Road Rage events in the past few years (mainly due to my driving style, whcih has now carmed incredibly!)
The worst one I had was being pushed down the A1 by some tit in a Laguna (turned out to be a taxi driver). Every time I went to slow down he would nudge the back of my car (very fecking scary!)
I rang the Police and told them I thought I was in danger and that until a Police car was at my side I would be driving at as high a speed as possible to try to get away, I was told I wasnt allowed!
As luck would have it the Police appeared from no-where about 10 minutes later (abd about 15 miles might I add!) The copper pulled the Laguna over and I pulled over infront of him, THE COPPER HAD NO IDEA I HAD MADE A COMLAINT AND WAS PULLING THE LAGUNA FOR DRIVING TOO CLOSE!!!!!
There was no damage to my car (still cant believe it as he nudged pretty damn hard) and I recieved a letter saying he had been banned for a year and given something like 9 points.
Now I drive much more considerately and give people room and expect others to make mistakes as I do, take it easy and just ignore the ignorant. Life, and driving is much easier that way.
Dont worry bout the guy being at your gym, anything happens he will know he is in the sh!t. Well done for reporting it and hope everything goes ok, if you let people off with sh!t like that they may think they can do it to someone else.