This prank is simple but insanely effective. You don a costume identical to your seat covers, sit back in the car, and coast up to the window at a drive-thru restaurant.
Most people think they’re going a little insane, or do a double take in case they’re eyes are deceiving them. A couple of others will, I suspect, take several years to get over the shock of serving nobody.
As awesome as this prank it, I do feel the guy missed a trick. In the last scene he speaks, telling the server he’s a ghost and to just throw the food in to the car.
Why didn’t he do this every time? Or, even better, why didn’t he pretend to be invisible? After all, there have been enough movies regarding invisibility that it would freak most people out.