While he wasn't surprised to hear his name all of a sudden, and out of the blue, Amos was still... Well... Surprised to hear his name all of a sudden and out of the blue, if you catch my drift. It wasn't really the hearing of his name that surprised him, but rather the face the voice was attatched to.
"Charity?" He blinked, partially because he wasn't sure what she was doing in Soho at this time of night, and also because the flash from her camera set little lights flashing in his line of vision. "Merlin, what are you doing here?"