It's hilarious when celebrities adopt some new sport-activity trend. It's truly a curious affliction. Patrick Dempsey races cars, and Jack Gyllenhall races bikes. It's no longer enough to own a Malibu spread teetering on the Pacific plus a fine armada of automobiles outside, not to mention a searingly hot significant other, and then a successful career (respectable or not). It seems they have this Bud Fox moment looking out over the skyline of their life -- "Who am I?" Well, most recently that internal voice answers, "I'm a Ping-Pong player."