If you had kept your temptation in check, you could have made a complaint against the car driver of careless driving. It's not really an option when you have just caused hundreds of pounds of criminal damage to his property. On investigation, your complaint might have been upheld, and if so might have been mitigated by evidence, including how visible you really were. Were there steady lights fixed to the front and rear of the cycle? What had been done (although not a legal requirement) to make the cycle visible from the side? Was there too much reliance on lights on the rucksack and helmet, which would have been swinging from side to side, and not necessarily visible to the car driver? At what point did it become obvious that a collision was likely and what avoiding action did you take? Of course if it had not been for the 'eyesight' gesture, the car driver might have been intending to apologise.