Daily Timewaster has a post that brought back a 50+ year old memory.
Our Engineer company was bivouacked in some trees near Wildflicken, Germany. As normal, having pissed off one of the NCOs, I was walking guard on a dark night.
Hearing noise on the perimeter I turned on my flashlight while calling out,
"Halt! Who goes there".
The light revealed the intruder.
Abandoning my post, I climbed up the nearest truck.