1) My GF goes out for hours with her mom and I didn't even know she was going out. Yes, she told me. Many times. I said ok. Many times.
2) My GF will ask me what I want for dinner, or if she wants me to make a sandwhich. She'll do it, then I'll ask why she did it. Apparently I can even tell her what I want on the sandwhich without breaking my concentration.
3) I've failed to eat. Not once, not twice... I've failed to eat and drink for over a day. And sometimes fail to sleep (or I go so long and hard that I collapse on the couch without ever eating or drinking). I've gotten myself physically sick from this. More than once.
4) I actually use this to my advantage. I once played 29 hours straight of warcraft II. To ensure that I didn't repeat the mistake in #3, I got a pitcher of water with lemons in it. I drank it all within an hour without realising it... and went about 12 hours before I replaced it, which is when I realised it. You have to realise that I was so distracted that I was attempting to pour an empty pitcher. It never registered.
Oh, another stupid thing I do... in true P fashion, I have worked myself into a hole as to my coursework. I needed to finish a course in 4 days - I'm not talking a project, I'm talking the entire course. Unlike most courses, however, I didn't know much about it - so I actually had to do it. Estimated time to do the coursework 126 hours, not including assignments? I figure I can do it in 96. So in a flurry of activity, I finished the whole course (no sleep for the first 2 days and eventually about 3 hours each in the 3rd and 4th). I fell sick on the 5th day, couldn't write my test, and failed anyway.