OK all you grill bast...uh masters out there, lets see if you got a pair or you need to put your skirt back on. Don't even think about doing this on a gas grill. I've seen it done once on gas using indirect heat and you could not tell the difference between it and an oven roast. We're talking a big, fairly expensive cut of beef here. You don't want to be ordering pizza 'cause you screwed this up. First you need a good cut of bone in standing rib roast.