“Bulgarian Open Water swimmer Petar Stoychev broke the world record for crossing the English Channel late on Friday, his time across the Dover Strait - 38.43 kms - the first one inside seven hours.”
I know there’s a certain amount of luck involved with the currents, but still, Wow!
38.43 km in 6:57:50 = 1’05 per 100 m, with no flip turns. I could hang with him for the first 100 meters. (Which is longer than I could stay with a record-setting marathoner, I suppose.)