Hi Geoff! Sorry for the delay in replying...took me a while to stop laughing...wasn't sure if you were making it up or not! Best stear clear of Horsham and bicycle racks me thinks. Well I cannot account for events such as this occuring in the process of following the 6 weeks exercise program...you best start again I think!! Your back will have really tightened up in response to a shock like that and will need the full stretching program again. YES the ice packing is very important in an acute injury (5 mins on 5 mins off, 3 times). For the long term tight muscles I advised you to use hot and cold packs alternately (3 mins hot, 1 min cold) - It REALLY works Geoff - persevere.