noise in driveline
 

I have a new 2009 camry with 5000 miles and I just recently noticed that if I am coasting for a little while and than apply the gas I sometimes hear and feel a singlesmall clunk coming from the driveline. It happens at all different speeds, but the common factor is going going from coasting to applyingthe gas. Does anyone know what this is and if it is normal?