Four days off turns out to suck. Couldn't flip turn properly more than, oh, twice. At the shallow end I kept flopping over sideways and getting disoriented. It probably is a sign something is awry when you "turn" and see people in other lanes in front of you. Very weird & disconcerting.
But a very nice dude in the next lane said howdy while I was in the depths of despair about the workout, which helped take my mind off the turns. Never had this problem on foot.
Which makes me think I should rename this the swimming log. Alas.