Earworm

Earworm is a music prediction effect for professional performers. Here's what happens: - You ask a friend to take out their phone, mute the volume and open YouTube. - You then take your friend's phone and play a song, giving the phone back with its screen facing downwards. - Now you apparently mentally transmit the thought-of song to your friend. - Your friend names *any* song, turns the volume up on their phone and looks at the screen to hear and see that your prediction was correct... that ex