@SZapper - I've never seen that movie, but I have dealt with a blank endorsement in real life.
When I was in high school, I waitressed so I could save up for my first car. I ended up saving $4,000 to put down on a car when I was 17. You can imagine how proud of myself I was!
When it came time to go car shopping, my dad and I got the money out of the bank in the form of a money order. We didn't endorse it right away because we weren't sure which dealership we were going to purchase the car from. When I chose my car and we made the deal, I filled out the money order to pay to the car dealership.
It was definitely a happy moment! And at the time, I had no idea what a blank endorsement was. I just knew it was extremely convenient for us to get the money out of the bank that way.