3D racing game problem

Okay! Im learing 3d and im not so good … so this game is heavily based on the great 3D tutorials by senocular … here is my problem

[swf=http://frip.dk/joppe98/Untitled-1.swf]width=550 height=400[/swf]

Ehhmm… I want to make soo when the car crashes into the camera the crash sound plays! but if he misses the camera nothing happends!

// edit : I know senocular knows the answer :bored: