Once the pair had finished trading barbs at the Institute of Directors all evening, attendee and Business Insider markets hack Will Martin says he spied Khan failing to outmanoeuvre a particularly tall man on the tube.
Not missing a chance to appease a potential voter, the mayoral hopeful flattered the gentleman and asked the him for his measurements.
The mystery commuter told Khan: “tall enough to get asked all the time, but 6ft 5.”
That doesn’t sound like to much to us, but Khan did look a little vertically challenged next to rival Goldsmith and our editor and debate chair Christian May.
With Goldsmith and May coming in at 6ft 3 and 6ft 4 respectively, Khan’s commute may have been the height of his evening.