Robert Griffin III cracked a smile and then expressed surprise Wednesday afternoon when asked about Griffining, the latest gesture to sweep the NFL.Who would have thought getting knocked on your butt and throwing a touchdown would start a phenomenon like that? he said during his weekly news conference. Griffining and RGIII and whatever they want to call it, Im not opposed to it. Its pretty funny to me.Since Sunday, fans have been imitating Griffins spontaneous celebration to his first career touchdown. The Redskins rookie quarterback struck the pose seated on the turf, arms raised and fingers pointing toward the Superdome ceiling as Pierre Garon raced into the end zone in the first quarter.Last season, Tim Tebow and Tebowing took the sporting world by storm. It remains to be seen if Griffining will have the same staying power, but a search on Tweetreach.com of the hashtag Griffining at lunchtime said the term reached 137,000 accounts.I havent seen anyone do it, Griffin said. But some of my teammates have made fun of me for it. Like I started it on purpose.