CharacterController colliding with normal Box Colliders

Hi,

I have searched, tried everything in every thread to no avail.

The question is very simple: I have a ball which has a character controller, it collides fine with the ground below it, but I have a script telling the ground to self-destruct after x seconds when the ball hits it. What function do i use in scripting to detect this collision? The script is on the ground.

Really can't seem to get anything to work