Know the incident well. Yes, those Hummers, were Hummers in name alone, they were actually just Chevy Tahoe's with a Hummeresque bodies. The only real Hummer is the H1.
As far as the event in question, the speed was actually very high, high enough to lift the bus off of the ground and land its wheel on the sidewalk. No one died though.
And this is a clear indication where bigger and more massive wins.