Heiji just gave him this look like come on dude, Americans totally make kung fu noises and pretend to swing imaginary samurai swords around Japanese people you have no leg to stand on here. It was probably lost on Snake, though.

"Think about them? You mean like how easy is it to get around? Well, we do have things like raised walkways that let ya know where to stop or turn when you're walking down the street. And there's braille on cell phones, maps, and stair railways... but you'd probably still need to ask directions if you were in Tokyo or somethin'."