This video uses an amazing math trick to give off that mind - reading effect - be amazed! Share with your. Subtract that from your original number. Look up the resulting number in the table. Can I figure out the symbol you are looking at? This video predicts your. This Guy Will Read Your Mind (Then Tell You How He Did It). He can read you like an open book. posted on Jul. 23, , at a.m.. Karsten Schmehl.