Magic works because our brains are constantly filling in the gaps presented by the stimuli in our environment. If you're forced to look away during one of those gaps due to a distracting event or person for even half a second, by the time you look back, the magician will have created the illusion.
Most of us will never become talented enough to perform these sleights of hand in the fraction of a second necessary to carry them out successfully. Instead, you can put psychology to work for you to create effects that are guaranteed to work after one or two tries.
this guys my favorite magician