Something Strange Is Coming, and I'm in a Mental Hospital

(This is a happy book. I hope to save everyone's unhappiness. Don't be too brainy, don't be too arrogant, just make you laugh and be happy.) I say I am a time traveler, but you say I am a psycho. I said I could see strange things, but you insisted on sending me for a psychiatric evaluation. I said I was helping others, but you forced me to be sent to a psychiatric institute. Do you believe it now? Go, go, don't bother me, I'm going to become an immortal!