It helped that Christian Bale, a reluctant smiler whose sharply planed face looks as if it had been carved with a chisel, slid into Bruce Wayne's insouciance as easily as he did Batman's suit.
In their new paper, Dr. Niedenthal and her colleagues point to a number of studies indicating that this imitation activates many of the same regions of the brain that are active in the smiler.
the smiler with the knife under the cloak
Mr Kim is an ace non-smiler.