This is a little notice to some of my students who have, perhaps, been watching rasslin' and applying those lessons to their performance in judo. Pay attention:
When someone is holding you down, it is not enough to bridge your butt off the mat or lift one shoulder clear of the mat - you're still stuck under the guy so you are still held down. You can't just sit there under the guy yelling at the referee, "My back's off the mat! I'm on my side!" You have to get out from under him - better yet, turn him over and get on top of him! Make it obvious for the referee that you are not being held down.
Pay attention to the positional escapes that I'm teaching you and practice them until you can easily find the escape for any hold-down!