I have hallucinated on demand many times of the same object, I know it can be replicated.
That's nice. That's not what is meant by "replicated" though. Get 5 others to hallucinate the exact same thing while being in separate environments away from each other, and maybe someone somewhere will give a shit.
I can't let doubt bring me down if I'm going to fly. I know what's true. And no, it won't be off a roof but on a stage with many people watching.
Easy enough. Just have to fall, and get distracted by something else so much that you miss the ground.