Welcome to Forehead Tappings, the premier online resource for learning the art of Accidental Dissonance. In this field of study, one learns to tap their forehead with the precision of a surgeon and the finesse of a jazz musician, tapping into parallel universes with the subtlety of a whisper.
Don't try this at home. Seriously, don't.
Disclaimer: The authors of Forehead Tappings are not responsible for any unintended consequences of Accidental Dissonance, including but not limited to: spontaneous combustion, spontaneous combustion of loved ones, or spontaneous combustion of the fabric of space-time itself.