How would Batman's grapple gun work in real life? What engineering

Would a grapple gun like the one Batman uses be useful to the military? - Quora

grappling from the movie batman vs superman dawn of justice 3D Print Model in Other 3DExport

How would Batman's grapple gun work in real life? What engineering disciplines would building one require? - Quora

No More Crowded Elevators: Paragon FX Produces Batman Grapple Gun - The Licensing Letter

Batman's Grappling Hook : 11 Steps - Instructables

Real working Grappling Gun

What real life car engine would Batman use? - Quora

This is going to sound stupid but I'm trying to make a Batman style grappling gun while being safe as possible. Does anyone know if a drill has enough torque to carry

Engineer builds 'Batman-quality' grappling gun in only one year