A 20-mm (1-inch) machine gun designed to shoot down aircraft. It was depressed to the horizontal, and was devestating against infantry. The paratroopers crawling all over the tank seemed too unreal, but weird things happen in combat, and no tank scared the Allied ground troops than the Tiger, so maybe they would crawl up on to it. NO WAY would a guy, even in a tank that was immobile, would get out when he knew there were enemy infantry on top of it. The sticky bombs blew off the tread, but the Germans could have still used the machine gun to kill every American before the 20 MM came up.
When I see the film 14 times, maybe I will finally figure out how many paratroopers were in this battle. There seemed to be more paratroopers in the battle then were guarding the bridge beforehand. Anybody notice that too?