Let me first start off by saying this is a great trick with some awesome options and different ways
to do it. But... if you are in a quiet room with no background noise, you can easily hear the
humming from the vibrations. I first did this trick in someone's home with no background noise and I
had it on my ankle. You could still hear the thumps and I had to scramble to get away from them so
that they couldn't hear it. I love the trick, it is flawless and very well made, but the noise is
tough to get around. Perfect for doing in a bar or a noisy area, but that is about it.