Not on a MUP today, but riding up a road with a tree lined median, a couple walking their dog on an extender leash(they being on or next to the median and the dog stretched all the way acroos) with their backs to traffic(wrong side of the road), I'm coming down a dip and approaching at 25mph(also the road speed limit) and yell out, "Pull in your dog, please!" The do and I say "thank you."