Man, a boss you can't figure out (we've turned him around and emptied all bullets available to a small nation into his back) right after an unskipable cut scene? It's like one of those cut scenes which is actually cool and bad ass and...that leeches right out.
That's quite a way in - otherwise it's ludicrous two player anarchy fun prior. Those mad strategies you formalise on the go between the two players.
Apparently you shoot him in the back, I read and watch a video where - the AI team mate shoots him in the back for ages, then the player pops out and shotguns something off his back. I dunno - I'd have thought all those bullets we shot would have done that by chance, atleast!