This is much bigger than anyone is letting on, imo.
Freeper PhiKapMom was at the stadium and the blast shook the stadium. That is NOT a pipe bomb.
Depends on the size of the pipe bomb (and I've heard of some pretty big ones in my younger days). But yes, this looks to be a very good-sized explosion. I wonder what kind of schrapnel or other byproducts are in the area of the explosion.