Talk:Pegasi/@comment-24266213-20140109233929/@comment-10390252-20140820121059

I read a great fanfiction once where Twi and Dashie are discussing the mechanics of the Sonic Rainboom. Twilght casually mentions that some cosmic rays hit the atmosphere so fast that they exceed the speed of light through air (minutely but measurably slower than the speed of light through vacuum) and that this makes them glow bright blue - 'Chernkhoof Radiation' she calls it.

Naturally, once realising that superluminal flight is hypothetically possible, Rainbow Dash has to be physically restrained from trying it.