Frightening *istD experience

[Paul Stenquist]

I was shooting some table top food for stock this afternoon. Had the 
*ist D set to manual. PC cord was attached to one monolight, the others 
were on slave. I shot about 50 frames, then on frame 51 the lcd review 
image  didn't appear. I hit the review button. Nothing happened. I 
looked at the window on the top of the camera. All the data was still 
in place. I went to take another shot. Nothing. Couldn't raise an 
image, couldn't take a shot. I turned the camera off, then on again. 
Nothing. Finally, I removed the battery grip and the batteries, then 
replaced them and turned the camera back on. Everything was fine after 
that. I shot another 20 frames or so without incident. It was sort of 
like a computer freeze. Has anyone else experienced anything like that? 
Could I have caused it by pushing the display button repeatedly while 
the buffer was full? In any case, I hope it doesn't happen again.
Paul