Well... dont walk that road, for one. Second, run like all hell. Even a seasoned martial artist needs to take serious consideration into combat with 4 opponents. If they're the follow-the-leader kiddy types, I'd say you could take a gamble crack the leader like you meant it, but if they've got anything 'tween their legs, you'll have 4 angry Asians.
Plus they might be ninjas.
- Op. Skinny Ninja