May not be expended to negate a social faux pax. The Linguistics ability is only used to represent languages your character knows other than English. You must engage the target in two way conversation for at least five minutes before initiating a challenge to gain information. This ability has been amended to allow tracking in both wilderness and urban areas. This means you may do things such as disarm an opponent.
Surprise lasts for one challenge and grants a retest.
After the surprise challenge, normal combat procedures are followed. If your normal action is to initiate a Mental or a Social challenge you may not use your Celerity. This includes any Mental vs. Physical challenges.