The bus was stuck in a traffic jam on 59, so it was the perfect time for Ziggy 4 to lock up.
Well, okay - not a full lock up. The trackball stopped working.
So, I pulled out the battery, waited, and turned it on again.
Trackball worked.
Of course, I lost my holster for it walking from the bus stop to work, but that's just a way of Fate trying to drag me down.
I figure some bum with a Blackberry will pick that up and be happy for a day or two.