Heard a "spring" like rebounding sound
 

As the title states, I heard the sound as I came to a stop when I depressed the clutch. It sounded like a door stop when you play with it, and it reverberated through out the car. I'm not too sure if the clutch feel was different after or if might have been something else, but I plan on bringing it to the dealer tomorrow or this weekend to have a full inspection in hopes that there is nothing wrong. Has anyone else experienced the issue before? My FRS is a '13 6spd and has a manufacture date of 5/13.