I can&#x27;t help but think that the bomb maker was inspired by the movie Juggernaut[1], which came out just a few years before this event.  In that movie, the bomb maker designed and built-in several layers of booby-traps, including  vibration switches, layers of detonation circuits, etc. as was used here.  Not a bad movie, FWIW.<p>[1] <a href="http:&#x2F;&#x2F;www.imdb.com&#x2F;title&#x2F;tt0071706&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.imdb.com&#x2F;title&#x2F;tt0071706&#x2F;</a>