I am something, I am nothing. I am short, I am tall. When you fall at your sport, then I stumble and fall. I have yet to be seen beneath a blue/new moon, I thrive in the evening and vanish at noon. I am lighter than air, I weigh less than a breath. Darkness destroys me and light is my death. What am I?
[I was just gonna do this in my random book but changed my mind]