I'm a card carrying elite ninja and do all my grapple tossing by hand, so personally I wouldn't be caught dead with a pneumatic grappling hook (although I may be caught dead with a chest full of throwing stars).
A pneumatically launched tactical line-throwing system developed by DFT for Special Operations Forces. The T-PLS can launch a standard titanium grappling hook towing a 7mm Kevlar line in excess of 120 vertical feet using a regulated air source. Minimizing complexity and emphasizing durability, T-PLS brings a much needed capability by mitigating noise and allowing the SOF operator to reach new heights in tactical climbing missions.
The only thing it's missing is a device that automatically sends you up the rope, which obviously us real ninjas would frown upon. However for you out of shape and/or novice ninjas, this may be a necessary evil. I don't know about that marketing picture though. Are they implying that you can grapple all the way to the sun? How ridiculous! Because once I grappled to Mercury to kill an alien warlord, and that climb was about all my arms could take.
Grappling hook back-ups high tech gear [crave]