Ever wonder how Fakirs and daredevils pull off the walking on glass stunt? We find out! Remember, this is for informational and entertainment purposes only, and whatever you do, DON'T TRY THIS ONE AT HOME! Watch for the secret! The glass is genuinely 100% sharp, but very, very brittle. Performers take advantage of this face to "rough up" the glass right in front of you before they walk on it.