Sam Fisher- Grappling Hook

I bounce to my feet and run toward the other end of the alley—but I quickly see this wasn’t a wise move, because there’s a sixteen-foot wall there. A goddamned dead end.
...

  This gives me time to pull out the cigar holder from the pocket on my left calf. I call it a cigar holder because it’s a long cylindrical tube—but it has many uses. I then reach into the Osprey, find the length of rope I keep there for emergencies just like this one, and attach the end of the rope to the cigar holder. I push the button on the holder and four steel prongs snap out, creating a portable grappling hook.

  I swing the hook twice and throw it over the wall. The hook catches on the bricks, and I give the rope a good tug or two to make sure it’ll take my weight. Then it’s just a matter of climbing up the wall, retrieving the hook, and jumping down to the other side.

  Now I’m on a street around the corner from the bank.

- Splinter Cell, Chapter 24