This is mainly good to use on yourself to prank people. In order for the trick to work, you have to
put your finger in the large hole and pull up. The problem is that it doesn't stay up, so if you
want to get an audience member to put their finger in, you can't let go of the handle, or it will
drop and likely reveal the trick to the audience. For this to make sense in performance, one would
really need to be able to let go of the handle without the high likelihood of revealing how the
device works. Once could potentially work pulling the "blade" up through one's finger as part of
the performance, perhaps to prove that it's safe, but that's about the only solution to the problem
that I can see.
The best way to use this is to repeatedly "slice" it through your own
finger. You have to do it quickly even then or any witnesses would likely see the "blade" moving.
This might be fun to use with blood capsules or in lieu of fidget-spinners for kids with
darker senses of humor. For $3.50, I'm not complaining.
If you're a toy collector, I
should note that mine came in a reclosable bag rather than carded as in the picture.
I
had always wanted one of these as a kid, and it was cheap enough that my expectations were low. It's
fun for a few minutes when you're in the mood, but I wouldn't recommend it for a performer.