Which is why, for all that he found the tendency slightly frustrating, it wasn't insufferable. He knew, more than anything else, Bruce blamed himself at least as much as he blamed anyone else. It's hard to be angry at him when he's well aware that a good portion of Bruce's irritation is fueled by his frustration at himself.

"No tantrums here. Promise."

He puts down the paper he was working on and makes his way over with raised hands to take his coat. It's less of a matter of manners and more of an excuse to put his hand to Bruce's back, see where he is tension-wise. And perhaps offer a bit of comfort, regardless.