I have gotten some off the wall shit that I chalked up to lack of sleep aside from "flash backs". You would be amazed what you can see, feel, and hear when worn out. Once I saw a huge Oak tree spring up in the middle of the hi-way, I pulled over to nap. That was when I was driving from Houston to Minnesota. I was told this won't end (something like that) when in total anguish of PTSD. I was losing sleep. Feel people touch you... Luckily it is rare for me now. My body says to hell with it and passes out where ever and when I have attacks if it is cold enough temperatures.