Junkers,
I think it was more like a million shares in about an hour, I think the rest of the volume that day was spurred by that pop, and, just maybe, a few of us tapped out guys found a little bit more cash for just a few more shares. I stood pat, myself, but no one wants to miss a run up!
Whoever it was, I'm 99% certain it was not one of us - so there was someone else out there wanting in. Like Sally Field said, "You like me, you really like me."