Had exactly that once (well almost exactly).
Oundle Road, headed out to Elton, you go up a steady incline that crests out at the top, then a quick little descent into Elton.
On the ascent, I sensed a car sitting behind me...for too long really, the road had been clear for ages....they then decided to overtake just a bit before the crest, got beside me and slammed on the anchors with a screech of rubber....fell in behind me...and turned left at the crest into their house
The indecision was incredible. Sat crawling behind me for maybe 100 yards, then attempt an overtake 20 yards before they're going to turn off anyway ...and the road was as empty as a grave all the way.