my understanding of the hand-grenade "play" vs some stupid celebration is:
typically on a kick off, receiver comes in with a number of R's into a small group, group then "bursts" for the return making it difficult for K to determine which one of them now has the ball. Seen it a couple times (mostly far below varsity level) never producing much of a benefit. Sometimes called the "starburst" or some other equally stupid name.
No idea what this has to do with BJ's post. I usually don't equate choreographed celebrations as "plays", although their is some bad acting, costumes, and the best outdoor stages involved
