For all those criticising the commentators, at least they weren't Brendan Foster -
Now serious question, the Serpentine is about a mile long (one lap round the outside is 2 miles according to the Serpentine Running Club's 2 lap 4 mile handicap) so why did the men on their two lap swim have to clamber out then jump back in? seemed a waste of time?
I think its so thet the TV audience can get a idea of who is in what position on the swim, I can't think of any other reason.
And also from a spectating perspective. Would you want to stand along the Serpentine and see the athletes just once, or would you rather they did two loops so you got to see them twice?