You begin to become anxious and fearful. This reaction is most likely a "conditioned response."
In classical conditioning, the conditioned response is the educated reaction to the already neutral stimulus.
A conditioned response is a conduct that does not fall into place easily, but rather should be learned by the person by blending a neutral stimulus with a potent stimulus. The potent stimulus is one that does not require any learning or molding to react to properly. Neutral stimuli don't at first have any reaction related with them, and the right reaction must be learned through rehashed pairings with a strong improvement.