Sign of Potty Training Readiness?

On Wednesday evening, 20 minutes before people were to arrive at our home for Life Group, Matthew decides to pull out his potty from the bathroom to the family room, strip down, and sit on his potty and watch Thomas the Train that way.  I was impressed he knew how to take off his pants (this is something he has never been able to do on his own...), although his onesie and diaper were still on.  Maybe this is showing a sign that he is close to being ready to train.  I can only hope, or not hope, depending how you look at it! ;)