I had a big infatuation with space and spacefarers and my personal idol and hero were Gagarin. I used it in some different games but one time i was going to sign up to something and the name was taken.
Allegedly, when Gagarin reentered the atmosphere and landed on earth he landed in a field where and a farmer and his daughter was working. They became terrified of the man in the orange space suit walking towards them he said something in the lines of "Don't worry, i am a soviet citizen like you, i just came from the sky and i need to find a telephone to call Moscow."
As i sat and thought about a new nick a song by my favorite band called "Truckfighters" came on. The name of the song was "Guy From The Sky" and it was so fitting. It has stuck ever since.
