Try a new nut, maybe it is working loose.
What is your current set up?
Clutch bell 17T?
Clutch set up, stock or other?
Wheel size?
What were you doing when it happen?
I tried it with a pre X and it rolled over sideways to much. Depending on what you have allready you will at least need LCG TVP's and some truggy wheels for a start.