I'm not sure but you might be able to "fly" in "Lucid Dream", since your aware, awake and in control of the dream. And if your in control why don't just jump of a roof and imagine that you can fly away.
Haha yea dude idoser is pretty hard to acheive flying. I have never had that real of an hallucination.
But idoser can aid you in to states in which the mind will throw a trip like that. Astral Projection, Out of body, or lucid dream will do it if any.
But yea those take a shit load of practice. months and months, or you have to just be really good at meditating and letting your mind go.
Ive gotten a 5 second OBE once. It was really cool, but then i thought about what was happening and i snapped back to reality. And ive never gotten one scince.