This concept of teleportation still sees it as a kind of movement.  What if they are actually disappearing and reappearing?  No gravity well issue then.,(reply>), I agree. Weaponizing an implosion for the purpose of <i>mass</i> destruction is impractical if not impossible. However in bringing up the Pistol Shrimp (my favorite aquatic animal!) you bring up an excellent example of implosions for <i>localized</i> destruction under certain conditions like high surrounding pressures.<br><br>Come to think of it, don't naval torpedoes rely on post-explosion implosion to do most of their damage to ship hulls?,(reply>), @Mike Churvis How is it not trivial to make a lid that retracts sideways (so it isn't fighting against the pressure difference)?  We are talking about a WMD level weapon here, that seems rather simple to make and yet doesn't exist (and hence calls the premise into question).,(reply>), +Sam Holden Because in a vacuum chamber the rate of repressurization is slow enough to not cause a pressure difference that <i>could</i> shatter one's eardrums. However if, for instance, someone found a way to create a vacuum chamber whose hull could instantly disappear (teleport away?), then one would be left with a sudden pressure differential so great that the collapse would indeed be explosive (implosive?).,(reply>), +Crispy Bacon And yet when vacuum chambers don't routinely shatter eardrums when opened and aren't used as weapons of war. Why would that be?,(reply>), @seigeengine As I see that how under your own terms you're correct, the video states that if you COULD create these portals, then you could create theoretically limitless energy. You said you're ignoring permanent portals, which is like saying "Human flight is impossible if you ignore technology." <br><br>While you are correct by ignoring something, you're ignoring the assumption that this discussion is about....