bounce

Hi,

check out the hitTest method of the MovieClip class:
if (mc1.hitTest(mc2)){
// mc1 hit mc2
}

To move in a random direction away from mc2, check the direction mc1 was going. If it went from left to right (e.g. mc1._x += 5), it will bounce off into the negative x direction, similar the other way around. So for the first case, you could use this:
if (mc1.hitTest(mc2)){
mc1._x -= 5+Math.random()*5 // moves away a random number between 5 and 10 in x direction
if (Math.random() > 0.5){ // switches y direction (up or down)
mc1._y -= Math.random()*5; // moves a random number between 0 and 5 upwards
}
else {
mc1._y += Math.random()*5; // moves a random number between 0 and 5 downwards
}
}

hth,
blemmo