Rear door/window clicking

Lately I have been hearing a clicking noise; almost like the sound of the power window motor makes when attempting to roll an already shut window close- a small click- when going over bumps or taking off from a stop.

Anyone else have this issue? I know in a car that sounds can bounce around and be difficult to pinpoint but just wondered if anyone else experienced this before I went to the dealer and have them look at this.

thanks