So let's get this straight. We have an open grill ceiling with a Mall above, and below it is a toilet. Mounted mid-way twixt the two we have a small boat-propeller. So if anyone above drops a small coin, the fan hurls it like a miniature frisby to embed itself in your skull! Great!
Ah, but the guy sitting on the pot can use the fan to blow all the stink up at the shoppers in the mall! Let's hope this thing isn't under the food court!