An Army Jumpmaster at Ft. Benning was giving his pre-jump briefing to a group of Marine Airborne students.
At one point in the briefing, he told them to lower their equipment at 250 feet and get ready to land.
A Marine asked, “How am I supposed to know when I’m at 250 feet?”
“That’s a good question. When you get to 250 feet, you can recognize the faces of people on the ground.” stated the Jumpmaster.
After pondering his answer, the Marines huddled, talking among themselves. One finally asked, “What happens if there’s no one there I know?”