My trainer put me to sleep

Yes, trainer workouts are boring as hell, but it was 7 degrees this morning and I was pressed for time. I didn't want to put on everything I own just to do some cadence intervals, (and maybe freeze my face off) so I rode the trainer.

I cued up an episode of  Rescue Me and went to work. But something weird happened. I remember every one of the intervals and the TV episode seems pretty fresh in my memory, but somehow I managed take the bike off the trainer, roll out the door, and do a loop over the front yard, across the street, and into the neighbor's back yard:

Anyone else ever experienced daytime trainer-induced sleep-pedaling?