Think of it this way: you yourself - the real-world Garthanos - and a few halfway-skilled but not-street-wise buddies (the party) walk into a room and interrupt a couple of badass bikers (the orcs). There's no-one else around for miles; you're on your own thus your options are to fight, flee or parlay. Parlay ain't gonna get anywhere with these guys, and if you flee chances are they'll come after you and fight you anyway.
So you collectively fight them, and barely win.
Yeah, you and your crew are probably gonna feel pretty good about yourselves after that - maybe even a bit like heroes.