Useless kickboxer

The minotaur hulk is borrowed from
http://www.thingiverse.com/thing:2037299
but with a different scale. X=150% Y=120% and Z=120%.
In this way the arms are longer. The leds in the circuit are optional. The motor is a small geared motor. The hulk is bonded to the motor coupler. The little ball slips over the switch.
https://youtu.be/IY9IPv_13V4
A more simple design:
http://www.thingiverse.com/thing:2028545