what she was telling you was that you were suspected of engaging in countermeasures despite repeated warnings to remain still;  you were administered a "silent answer" test, which is designed to eliminate answer distortions which occur on occasion.  If the movements continue during this type of test, it's a good bet you were attempting CMs, just like George M. did on two separate occasions with two different, unrelated agencies.  This type of behavior is considered "purposeful noncooperation".  Contrary to what you read on this site, CMs don't have to be confirmed, only suspected, to put a quick halt to your employment pursuit. George found out exactly that when the FBI and LAPD showed him the door.