Rearview mirror sun reflections

Driving along the interstate, on the way to grandma’s house, going in just the right direction, at just the right time of day, at just the right time of year, such that the sun reflecting off of driver’s side rearview mirrors of the cars ahead dazzles, brilliantly, blindingly–wasn’t sure what it was at first–then, the road curves, the angle changes, and, one by one, the lights extinquish.