How about my OC "The Cleavage Crusader" (in costume) experiencing muscle expansion, flexing one arm and staring at her giant bicep in confusion. And maybe a rough word balloon of something along the lines of "Well that's new."
I posted a couple reference pics in the BE forum:
http://www.process-productions.com/f...ad.php?t=33275
(in case its hard to tell from the black and white reference, she also has black gloves, a simple belt with a circular buckle and a foldable bo-staff that rests in a pouch on her back).