In fact , no such technology existed during the lifespan of East Germany .
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 .
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 .