This won't blow people's minds, but it is a fun trick. What I love is that it's truly impromptu. If
you take time to work some "magic" into it, you can steer clear of the "party trick" it can easily
come across as. Slow it down and give it context, and you have something truly clever and unique.
Not bad, good to have in your arsenal ready to go if you've have nothing else on you.