Fun fun. You want a bounce back. Well, you will need to animate some frames for
the MC if it hits a wall and duing the hit test would then play those frames.
Or you could just do all actionscript with it but i'm not sure what that would
be right now. Do you know how to do a hit test? Because i can tell you how to
do a regular one.

I need help with a kind of this problem too...
I have a circle (movieclip) that I can control with my arrowkeys.
When it hits a wall (movieclip) it should stop or "bounce" back.
(the circle shouldnt move threw the movieclip)
Please help me with this problem... :)