Talk:Sonic rainboom (event)/@comment-1023843-20130226051041

so if rainbow dash is the only pony to ever successfully do a sonic rainboom, how did anyone know it existed before she did it? in the episode where rarity gets wings, one of the ponies that were bullying rainbow dash calls it "an old mare's tale", which implies that it's existence was known before she did it, which implies that another pony before her was able to do it. unless the sonic rainboom really was really a myth that turned out to be true, i don't see how it makes sense.