I did some research on RWS a couple years ago and was gobsmacked to discover the number of vendors and product offerings available, as well as the level of improvisation.

(the fun starts at 1:00)

For years, I grew up thinking the East Germans had autoguns on the Berlin Wall. Turns out it was effective propaganda.

Although referred to within the Border Guards by the National People's Army designation G-501, for propaganda purposes the mines were referred to as "Automatic Firing Devices" (German: "Selbstschussanlage") in public documents. The cryptic description led to the public perception that the mine was a type of automated sentry gun (rather than a simple static trip-mine), a misconception shared even with Western intelligence agencies. In fact, no such technology existed during the lifespan of East Germany, and the mine was actually more similar in capability to an oversized spring gun, but the rumors provided an additional psychological deterrent to would-be border crossers. From 1973 onward, the mines were enclosed in a plastic box housing for protection from the elements, further concealing their design from onlookers.