The man on the motorcycle named his motorcycle "The Great Escape" because he loved riding it so much. He was married to a woman who made him mow the lawn, take out the trash and brush his teeth. He did not like being around her very much so he bought the motorcycle to get away from her.
That's also how he became a top secret undercover operative. His mission was to ride his motorcycle throughout Germany and sound alerts if he saw anything suspicious. He saw a lot of suspicious things and then he would yell "one if by air, two if by sea."
Unfortunately no one really knew what he meant and basically ignored him. We won the war anyway.
