So, every year for Halloween, we do up a big deal in the carport for giving out candy... strobe lights, fog machines, skulls, creepy music, that kinda thing. The music plays on my laptop, and I needed something to make thundery noises while I'm stomping on the footswitch that runs the strobe - hence the Thunderbox.
All it does is make thunder noises on demand, so don't get too excited. I suppose you could use it to make stormy noises on the phone, if you were trying to convince your boss that it's raining too hard to come to work today. Lemme know if that works out for you.