I had my laptop on (appropriately enough) my lap when I heard it make a loud beeping sound, and then the cursor froze.
Weird things like this happen to me on occasion. And as I started to curse myself and figure out if I had to run to Best Buy to talk to the Geek Squad, I told myself to try to recreate the position the computer was on my lap.
After some wiggling and maneuvering, I heard the beeping sounds again, and I've regained use of my cursor.
Now I have to figure out which positions I can sit in as I use my laptop going forward. I never thought computer ergonomics would require so much thought.