Just thought I'd share a little bit of stupidity on my part. Late last night I was riding home from my sisters netball. As I came around a corner relatively hard I lost all forward momentum and heard a terrible grinding/crunching sound. So I pull over and click into first and try to take off. Same sound. So I try all other gears but the same thing happens. Shit Ive done the gearbox was my first thought. So I spent the next ten minutes looking at the bike, wondering how much this will cost me. I call my sister to give me a lift home and when she rocks up she says to me. Why is the chain hanging down like that??????