Well he puts on the suit in the arctic according to the trailers we have seen...but yea this is likely his first time in public wearing it. He just doesn't quite know what to expect, and he is really worried for the people, how they feel about him, and everything.
I love that Snyder and Co are really wanting to make his audience FEEL what he is feeling, because even in that short clip..I feel his nervousness, his anticipation, his self-amping up as if he is about to get in a boxing ring.
F'ing LOVE IT!