I don't think its Hind D.

This sounds more like the escape theme, when you are on the jeep getting away from liquid. I actually have the Hind D music on my MGS4 game, and the begining part sounds like it, but right after that it sounds alot different. So, no worries bro, it is the escape theme :D

hmm...

The first time you hear it is when you're rappeling away from the Hind D

And you hear the boss part throughout the game...

im very sorry

i am very sorry for you but that is not escape that is hind my boy or so i think because its a long time i heard these things