I took this to Best Buy for some fun. The only downside was the MASSIVE amount of interference in the store, which caused all the stations to have static. Despite this, I waved my hand over radios, asked clerks if the TV's had radio built in, touched 2 CD's together, pressed the X button on the PS3 and asked what was wrong with it, turned the knob on every appliance, etc.
Never gets old. My GF wanted to kill me.
Haha that's PRICELESS! Now I almost want this just do do stuff like that...