(In case you missed it, watch Eric's appearance on Fool Us.)
From "HOW I Fooled Penn & Teller!!! (SECRET EXPOSED!!!)" on Eric Leclerc's YouTube channel:
MAGICIANS ONLY! Magic Spoiler Alert! A full tutorial and explanation of the ruses and methodology I used to fool some of the best minds in magic! I decided to reveal the secret because we invented this Magic Trick SPECIFICALLY for this show! It has never been done before AND I will never repeat it again!