Terminator Genisys: 18 Stupidest Moments In 2015's Dumbest Movie
8. The Villain Kill Is Based On More Suspicously Inconsistent Science
The film once more laughs in the face of real science when Arnie's Pops-bot works out that magnets are fatal to John Connor's new type of shape-shifting killer and fashions himself some magnetic knuckle-dusters. That particular weapon is used to help bring Connor down when Arnie grabs him and puts him in the time machine to kill him.
That's all well and good - ignoring the fact that Skynet created the most easily defeated robot ever - but the magnets apparently only work on certain metals. At no stage do they stick to Arnie's own body, or any of the environmental metal.
Because magnets are always so selective.