Ah Doc Robertson...............
Back in the 70's , while inspecting the back of your eye cavity , would casually ask if you saw many rafikis in the Bumdusters/Aero Club etc etc ( delete as necessary ). We eventually worked out that he would sometimes stop on the way home to Langata and walk through one of the doorways into the DBusters and straight out the other , casually noting who he could see at the bar , and if he saw the same face a few times would start the 6 monthly interrogation !!
We finally 'got' him by spotting him getting out of his car , and locking the 2nd door , so stranding him dead-centre in the pub ,hoots of laughter etc....... Good man though , saw the funny side of it all ,and stood us all a round or two !! Happy days.......