Talk:Pegasi/@comment-11570611-20130727231733/@comment-10390252-20140128125940

I think that the event in Lesson Zero was Rainbow breaking through the Rainbow Barrier just after she entered the barn; the Rainboom's effect front then had the effect of blowing away the structure of the barn. Moments later, she hit the ground with so much energy that she displaced most of the volume of earth of the hill on which the barn was built, creating the rainbow mushroom cloud (displaced dirt and dust illuminated by the rainboom).

My favorite name for it is the 'Sonic Rain-Bomb' and some scientifically-inclined brones have estimated that it was about the same yeild as about ten tons of TNT.