Thanks for all the replys, some usful info there! talk about this for bad luck though, when comin to the end of the day (luckily)... I did a drop off which was about 6ft it was off a sea wall onto a river bed (the tide was out.... plus i didnt have my arm bands!), but anyway when i landed my back brake seemed to have stuck on, and when i looked there was the smallest of stones in-between the brake pad and the block (if thats what its called) which caused it to jam up. N if u look how small the gap is, its really bad luck is that! thanks again, Chris