dr. chengeally explains things in a way we can understand. >> and now you're holding a ball. don't hold this to your body like so, but hold it off your body. >> he really americanized learning tai chi. >> and because you get three viewing angles and an ingenious, simple foot-placement grid, you always know where to put your feet. it's foolproof. if regis and i can do it, believe me, anyone can. >> what dr. cheng has created here is truly amazing. tai cheng makes you more flexible. it improves your balance. it takes away your aches, your pains. it makes you feel younger, stronger. it works! joy and i love it. but the big question is, why does it work? to help us with that, please welcome emergency-room physician dr. steve salvatore. welcome to dr. steve! [ applause ] dr. steve. >> how are you? >> good to see you. >> great to have you here. dr. steve, i got to tell you -- tai cheng worked wonders for joy and i, but why does it work so well? >> you know, regis, i'm not surprised it worked for you.