Strange thing, when i accelerate i can hear something roll from the front to the back, when i brake, it rolls back to the front, and the same when turning left or right, if i put my foot on the floor like in the middle of my mat i can feel somethin move under my foot when i hear the out of "it" moving, i'm not sure how far it goes, but it stays around the drivers seat area, maybe passing under the centre console, not suyre as i'm only going by sound really, just wondering if 1. the floor is hollow, 2. if anyone else has experienced this, and 3. how to get into there lol