Walk “up”?? ;-)
Well, of course! I hope you don't think that was faked. OK, yeah, the capes were hanging toward the building, but that was, uh, uh, rogue air currents. Yeah, that's it.
https://www.youtube.com/watch?v=KLuT38m-anc
“Bat-climbing” with cameo appearances.
“Careful, Robin, it’s quite a drop.”