Any act that that is performed without tremendous conscious thought when one would be sleeping if one were an average person. This can either be things done to kill time while suffering from insomnia, or things done to keep oneself awake when one is in a bad position to fall asleep (while driving, in meetings, etc). Usually these things are either completely atypical of personality, delusional, or so revealing that they become embarassing when someone else points them out. For example, excessively noding about the effects of insomnia, or noding items a bit more personal than normal. That and really ridiculous spelling errors on words like the and Everything. Also included in this category is:
There are many other such items but it's taken me almost an hour to write this one node. I think I need to get some coffee.