Sorry I didn't elaborate. A filter can get clogged/blocked by crap in the pan. As you mentioned ...usually it is from severe damage. Stopping the engine stops the pump and the junk will fall back into the pan, usually giving you a few more feet.
I wasn't trying to setp on your feet Daheazle. The couple posts I've seen from you so far, it looks like you have a good bit of trans knowledge.