It was a shame that I had to pull out due to my bad leg and major bike damaged.  I hadn't hardly done more than 1 lap in my first race.  What happened was in the first race I was first going into the corner but for some reason the other rider T-boned me and caught up in my back wheel and I dragged the bike along as I was coming out of the 2nd bend - but luckily I didn't come off.  The race was stopped.  I went back out in the rerun and I made the start and was leading until my rear wheel locked up as I was coming out of the 4th bend which threw me over the top of the bike and I hurt my left leg which is swollen (just above my knee) so I took no further part on the day.  I think what caused me to come off my bike was damage from earlier on where the rider T-boned me and his front wheel got stuck in between my mudguard and swinging arm.  This may have caused the swinging arm to weaken and caused it to crack and twist which made the chain come off and lock my rear wheel.  So I damaged the sub frame, swinging arm and forks and a lot of small bits (where's the money tree gone??).