Back in the army, some sort of commanding officer tells the grunts that they are forbidden to go after the hostages, because the Goliaths have consistently taken out anything that came within two hundred yards of them. David stares off into space either thinking, "I am totally going after those hostages" or "I wonder if they are having Salisbury steak at the mess hall today." It's hard to tell.
That night, while the other soldiers sleep, little Davey lies awake thinking. Moments later, he's back in the trench, chatting with the lookout. He finds out that the enemy just put up a shelter behind the tanks. David strips off his gear, because he claims that he can't run in it, and the lookout realizes that David thinks the hostages are in that new shelter, and he intends to go and get them. The lookout first threatens to call David's brother, and then says that David will be court-martialed. David uses his fancy duct tape to fashion some sort of weapon and then sneaks off into the night. He Scooby-Doos up to the Goliaths (are you getting the allusions yet?), and crawls underneath one to get closer to the shelter. He sneaks over (worst watchmen ever, by the way), enters the tent, and then helps the hostages to sneak out. One of the hostages has a giant bandage on his head, conveniently covering his face.
They sneak almost all the way back over to the Gilboa side, and seriously, I know it's late at night, but is no one looking out? The injured hostage falls down and then one of the Goliaths roars to life and starts shooting at them. They dive into a trench, and David tells the healthy hostage to get the injured hostage back to their own side while he covers. David tries to take out the tank with some sort of bazooka, which fails. He then throws his homemade grenade (I guess?) at it. It doesn't explode, and David is left standing defenseless in front of Goliath, but then it suddenly does explode, which gives David time to run back to his bazooka and take one last shot, which connects. Down goes Goliath!