Complete and utter crap. The video here looks quite impressive but I could not get results anywhere near as good as these. And the idea that the trick was designed to be performed in shorts has me baffled—was it also designed to be performed in front of morons? Anyone who sees this effect in person will see how it’s done especially if it is performed in shorts.It is garbage—save your money. There are cheaper and easier ways of achieving a similar effect that is just as ineffective when wearing shorts but are much more effective than this when wearing pants.