They want to cross over the Wall on a zip line.
Four family members from the West are helping them:
Kurt Holzapfel from Mainz Heinz’ brother
Hermann Schmidt from Nuremberg Heinz’ brother-in-law
Gerhard Lindner and Kurt Lindner from Burgheim - Jutta’s brothers
Son Günter: And what if they shoot?
Father Heinz: They won’t shoot toward the roof because no one will see us there. And if we’re careful, they won‘t see the zip line either.