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Batman's one rule is that he never kills, but his grappling hook may pose a few problems. Kyle grapples the truth on this week's Because Science!

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Learn more:
• ARM RIP TUG OF WAR: http://nerdi.st/1PaTfRR
• POWER REQUIREMENTS: http://nerdi.st/1RjWmOW
• PHYSICS BATMAN FALLING STOP: http://nerdi.st/1M6e3zb
• MAXIMUM ARM FORCE: http://nerdi.st/1XtNLYd