I personally love it anytime I see someone wearing a costume in public. That's with the exception of being in Times Square or Hollywood Boulevard. Over there the people in costume expect you to give them money for taking pictures with them. I'm not into that. If I wanted a picture with Elmo, I'd bust out my Tickle Me Elmo and a selfie stick. I wouldn't hug up next to a guy who smells like feta cheese in a grimey red costume.
Seeing a superhero character doing normal real world stuff is just so tickling to me. This picture makes the situation even more epic by creating a stare down by two of nerdom's most badass characters. Who would win between these two? My money is on Darth Vader, though I don't think it would be a wash.