Instead, it just pulls you to the thing, no problem. Now, you may take a very 2X14 approach to this scene and say that this would pull off your arm if it could generate enough energy to get you across so long. But then, that would be ignoring the fact that the grapple gun instead moves the universe to where you wanted it to go, ignoring all the regular laws of motion. Your mother created the design as one of her first designs as a young lizard lady, of course, she had help with her mentor.