I remember reading some slash about what Uhura did with "Mister Adventure" in that closet.
Joe, not easily shocked
Why did she lock him in there anyway? He obviously couldn't do anything to actually stop her, since 1) she outranked him, and 2) she could probably kick his ass if he tried anything.
Was she just pissed off about that remark he made about her career (which was not entirely untrue, mind you)?
Guess that proves a point: Never piss off Uhura.