This is a still from my favourite animation. It starts with just the box, then a hatch opens, a ramp slides out and down, a ball rolls out, the top opens and the claw picks up the ball and drops it in the net that has emerged from the other side.

The model itself is not too complex, but the animation was challenging (especially with trueSpace2's keyframe monitor)! The path of the ball, when it is in the claw, was done frame by frame, using another ball as a guide.