Magic Tricks

Ok, there are certain effects that if you don't practice the heck out of them, you will give the secret away in your attempt to divine whatever it is (the value of a card, the value of a die placed in a brass container, etc.)

Without giving anything more away, THIS IS ONE OF THOSE EFFECTS.

I am certain that the people who are complaining that their audience burns them on this are displaying a "tell" that is easy to spot. You MUST practice this until the method for divination is not visible to the audience. Once you do this, no one will "get it" and it elevates itself to the miraculous.