Thats such a scary sessation.
I am new to all these Jaw problems but I remember a few weeks ago I was trying to brush my teeth and i couldn't open my mouth very much, and I was scared to even try incase it got stuck, I wasn't sure what was scarier. it being stuck or the pain!
then it seemed to have settled down, I went and had something to eat, took my first bite and out come a huge crack following by another 2.
eeeww.. I just hate it.
my physio told me to just try and relax if ever my jaw does get stuck, maybe try some good cream and rub it into the joint area, it might help.