Bit gutted, got a puncture on the outside edge of my 18" goodyear f1s, it was a bloody fat screw. i took the alloy off and put the audi spare (looked like a 16" or 17") on in its place so i could go and get the puncture repaired. I was told they couldnt repair it cos of the location of the puncture. So i get back to the car and decide to move it round the corner with the spare on. As i tried to pull off there was resistance, almost as if the handbrake was on, it just didnt want to move. I gave some more revs then jerked forward a little and was then fine, it started moving. I am really worried that i may have done some damage but cant tell much at the moment as its dark. I cant think for the life of me what would have been causing the resistance and why it jerked forward, any ideas?