from the only image ive seen of this occuring with ponies (mlp genesis comic fanfic) which to my utter dismay has been taken down before i could save the picture, I described it with the phrase Quantum Flash Bolt as the flash was so bright (and yellow not rainbow guess i should have told you) that the rest of the sky went black, and there were huge arcs of electricity between the light ring and the ground, instead of a trail of light the pony as imagined was going so fast it appeared to simply appear in its destination instantly...which was the ground, it was soo awesome... except that she died...but she did it to save pony kind so it was not in vain!