The Care and Feeding of Jaguars

I was on the way into work this morning, and I noticed some wind whistle from the driver's door.  I then noticed that the window would not roll all the way up.  So I spent some time thinking about why.  Typically, power to a window crank turns off when it meets resistance.  Could there be ice in the channel in the door?  Didn't seem to be.  So I thought about it for a while, and I considered the possibility that some melting snow had ended up in the crank mechanism, and frozen into ice, preventing full motion upward.  So I turned the heat way up in the car, and kept rolling it up and down -- and finally, the problem went away!