I always say "get out" whenever I schold a dog, I really like to use my sons Red Ryder! And any time I say "get out" they may not what they are doing wrong, but they dang sure stop!
I am not sure I like that approach, I prefer to be a little more direct with my training and the commands I use during training. What if I want the dog to get out and quit barking, or what if I just want the dog to get out, how do they know what to do?