As the army truck loaded with the machines is heading for the coast it's attacked by a Stuka dive makes 3 passes dropping a bomb each time but the Stukas only carried a single bomb and despite the 3 explosions there's no sign of a bomb on the 2nd and 3rd passes.
When the foreman rings the Managing Director to get permission to go to France, the Director is dictating a letter to the secretary. He stops after the word to but there is a pause of a second before the phone rings as the bell was obviously rang too late to interrupt him.