User Scenario
A person walks underneath the cloud and it starts following them. The amount of personality conveyed by the cloud is up to the operator, and the level of interest/anger is left up to the subject.

Implementation
Analog electronics, coil relays, and transistors to control the high current, industrial power motor, and an XBee to relay "button pushed/button not pushed" data.

Conclusion
10 amps is a lot of current, and ratings mean something on electronic equipment. If you try to exceed the ratings, electronics melt or connections break.