Last night I saw a friend's car in a store parking lot, so I wrote a quick little note and left it under her windshield wiper.
I guess she drove all the way home with this note - never noticing it - and then saw it this morning.
So she calls me up wondering how I knew where she lived.
She must have been imagining me skulking around her house in the middle of the night, with my pants around my ankles no doubt, peering into her windows, only pausing long enough to leave my note.