Pneumatics
This prop is easy to throw together and the cost is comparatively low for the effect. Here's your parts list:
4 feet PVC (I used 1/2" instead of the usual 3/4". I feel the less PVC to fill the more air that goes to the whips)
1/2" PVC end caps x 2
2 Way Solenoid Valve (Mine is a Monster Guts)...