As a NOW clean 'n sober meth head my longest 'run was 17 days without sleep. It as definitely interesting. The delusions were the most interesting part of the experience. I had many friends who imagined helicopters following them and 'tree people' spying on them altho I never spotted either. My favorite experience was imagining songs were following me around from store to store magically. "This is your brain, this is your brain on drugs." It wasn't pretty. Thank God for sobreity.