This sounds like something from an old explorer novel. Indiginous tribesmen shooting at airplanes etc. Nobody from the outside has had contact with them and it is meant to be kept that way. Cool.
Murdoch puts a wad of plastic explosives onto the lock of a safe, connects it, gets about 2m away, turns his head and blows it up. When the smoke clears, the safe door is open but curiously undamaged and neither is the cash inside. Awesome!