Nice parody of "Metal Gear 2 : Solid Snake"'s final boss battle...That was really illogical to try shooting down someone made of flesh and bones (even if he's called Big Boss) with a rocket launcher !
That was the final boss fight for the first Metal Gear, the 2nd one was Snake going McGuyver and taking him down with a can of hairspray and a Zippo Lighter. That Rocket Launcher was the only way guaranteed to take Big Boss down and even then it didn't work!