We're so used to the crime fighting duo of Batman and Robin that we often forget the incredible duo of Batman and Batman. By the looks of it they had to share pieces of costume, because that's a lot less armor on the bat than I'm used to. I can't imagine climbing that tower was any easier with Walmart Batman masks on, but they definitely get extra style points for it.
Group activities can be fun and all, and I'm especially happy anytime there are two Batmans in the same room, but I'm not sure I understand the concept of doing a climb like this with two people. Are they hoping to save money on a joint funeral? Then again if they climbed separately and the first guy to go falls, do you still go through with it? Something like that can really steal your thunder.