Help me get inside this fish's mind

[UATrewqaz]

I noticed a player on Full Tilt the other day, a micro limit player (.5/1) playing badly (stop the presses) and by badly I mean really badly.

We're talking 90% + VPIP, cold calling 2, 3, and capped betting.

Calling down with any pair, any 2 face cards, etc.

This person never said a word, dropped like 50 BB, rebought and lost another 50 BB (I took a break in between but they played for about 4+ hours straight).

So anyway I log on again today and lo and behold they are playing, they've moved down to .25/.50 but their play is 100% the same. They play almost every hand, regardless of the betting, and see every card to the river.

They went from $20 to bust (40 BB) rebought up to $60, I went to the grocery store and came home just now (probably over an hour) and lo and behold this person is still playing and is currently down to $20 (another 80 BB loss).

So what's the deal? How can someone without serious brain damage be doing this?