The Crooked Picture Bomb
It is a well-known truth that the Nazis were skilled at setting up devious booby traps to disable allied forces searching for supplies or weapons as they withdrew at the close of World War 2. The normal bomb-rigged food or cartridge boxes were also provided, but they were solely intended for the lower-ranking personnel. Yet, the higher-ups weren't fooled by gleaming weaponry or tasty meals. The Nazis had the bomb with the skewed picture for them.
This trap, which was frequently set up in abandoned military buildings, included purposely tilting a picture on the wall in a peculiar direction. Officers, on the other hand, were more inclined to care about framed art and fix it, but lower-ranking soldiers rarely bothered with something like that. When they did, the frame would detonate in their face, killing or immobilizing them instantaneously.