V (Speed Racer’s car). Or is that the MACH V? I’m not sure.
spots the X.
My boss is named Mark so whenever the name comes up, I usually associate it with him.
Thus has limitless possibilities for notable Marks catching sight of their “old time used-to-be” in public or out-of-the-way places.
What might make for a fun follow-up would be to list such Mark candidates along with their Ex(es).
Just a thought for at least a good hijack! 
Corrigan
And that’s my third Peep Show reference in the past couple of days. I have to quit being so damn thematic.
MARC Standards
Mero
What most folks call me.
Belanger
Brunell
Calaway
Henry
Knopfler
Martin
_ Maker’s