Years ago I used to race 100cc karts and I had built a double deck trailer, for 2 karts, with open-topped box on front for tyres and wheels. Been up at one of the tracks at Golspie or Banff, on way home after going up long hill realised the guy I was with, was no longer behind me. After waiting for a while he didn't appear so turned round traffic island to head back to look for him. Caught the inside wheel of trailer on kerb of island and it tipped the trailer nearly over onto it's side. Far enough that several of the tyres fell out and started to roll down hill. By the time I'd straightened everything up, one of the tyres had gathered speed with me running down the road like an idiot chasing it, just in time for my mate to turn up to see it.
Took a while before he stopped telling everybody about it. :roll: