Watch this one 1st,
http://www.jackals-forge.com/lotus/movies/Spa2005_crash.wmv
Then this one.
http://www.bookatrack.com/-PFexboyracer285824164?exboyracer&2858&24164&video/mpeg
Oh dear! 
The first video made me chuckle it was like synchronised crashing 
video two never worked.
[EDIT] Done a save target and it worked, video two looks a lil more painful, but I have done and been in worse 