One time back in the day me and my boy were smokin in front of my crib at around 4am. We were both tweakin and that dude never tweaked really, but when he did he would always end up being up for days.
Well he had been up for like 4 - 5 days and all of a sudden he was like "God Damn! It's windy as fuck out here tonite". I just looked at that muthafucka, and was like, "What the fuck are you talkin about? Aint no wind out here. Shit is calm as fuck!" He had been up so long he was seeing the trees moving and shit. I had to grab his keys and take dude home.
Moral of the story. Go to sleep before the trees start moving homie!