Revealing mistake: In the scene where a British soldier (Williams) and Sgt. Joe Gunn (Humphrey Bogart) are in a trench, the British soldier is shot dead by a German sniper. Joe Gunn moves in for a closer look and it can be seen that the "dead" soldier is breathing, his shoulder is moving. (01:15:30)
Revealing mistake: In the scene where we first get a glimpse of the German fighter, it banks to the left and it can be seen there are no fuselage-mounted machine guns. Then when we have a close up of the pilot, the machine guns are mounted just in front of the cockpit. When the aircraft is making its strafing run, the fuselage-mounted machine guns are not there.
Answer: Thank you for that! I first saw Sahara on television when I was eleven, with my mother, father and younger brother. When we saw the shell explode in the well to re-open the water supply, we all dismissed this as Hollywood hokum. But sometimes it is amusing to be proved wrong. You put a smile on my face when you informed me, and quite convincingly too, that the well really could have dried up but then opened up again.
Rob Halliday