Hm, I think. Where do I know that guy from? Friend of a friend? Did I see him out that night in Dalston?
And then I remember: he is my doctor.
Thus: as is appropriate for two people whose knowledge of each other outstrips the depth of their acquaintance who run across each other on the tube platform mid-commute, we look at each other with slight alarm, and do not do so much as nod.
