Driver Side Rear Sound

I have a 1997 Cav, and there is a weird almost bouncing sound coming from the rear driver side. My friends described it as almost a tennis ball bouncing around. Does anyone know the reason for this? and is it fixable. Thanks

Muffler loose ? Strut loose or broken? strut mount broken ? your description is pretty vague. Is it a heavy noise or light sounding noise. Does the car handle ok ?

Its a light sounding noise, i cant really describe it. It might be the muffler, i'll have to check becuase it does kinda rattle. The car handles fine other then a little alinement screw up

maybe the stereo speaker is loose, or the torque rods for the trunk lid are off or broke? nothing in the trunk rattling around

Yeah i was thinking something in the trunk's wrong, its near that area. I havent had time to take things apart back there

Hey man i have a 97 Z24 and it dose the same noise im pretty sure its the shock mount