Dream: Big Dog, Small Car

I'm driving west a on country road near my work place.  A very small black car cuts in front of me from a side street from the right.  The car is an open, one-seater, no bigger than a go-cart.  I recognize the driver as JG, whom I worked with at my first job at least 25 years ago.  But most noticeable is that there is a big black dog in the compartment behind the driver.

We come to a stop at the end of the road behind a line of other cars that are waiting to enter the intersection.  The dog lies down, but only its body fits in the compartment, so it rests its head on the driver's bald head.  I call out to him, "Hey JG, are you alright under there?"  The dog stands up and turns around, and JG turns his head halfway and responds, "I'm okay.  And you?"

I notice that his response doesn't include surprise at having met by chance after so long.