I have the same car and very similar problem. Mine is what sounds like a revving of the door motor followed by a big jerk (as if it had been stuck) and then the door seems to open/close fine. I haven't noticed any significant popping sound. This doesn't happen on mine every time, probably 40-50% of the time.
In searching for answers i ran across this youtube video that did have a popping sound that seems like what you are describing. YouTube - 2006 Odyssey Sliding Door Problem
I'm still searching for answers, and hope more advice comes through this thread. Good luck!
In searching for answers i ran across this youtube video that did have a popping sound that seems like what you are describing. YouTube - 2006 Odyssey Sliding Door Problem
I'm still searching for answers, and hope more advice comes through this thread. Good luck!