Swim Golf

Any body ever try swim golf? I read it about it somewhere, and it goes as follows: you swim a 50 mtrs/yards and add the number of strokes to the number of seconds it took to complete. That's your score.....The coach recommended that you need to shoot for 80 or below (for 50 yds) as that is what a 13 yr. old in his program would do.....well, damn, I tried that yesterday in about 4-5 different approaches, sometimes lenthening stroke, some times speeding it up, and I ended up at 90 pretty much each time (no diving, no flip turn). Not a bad way to gauge your efficiency from time to time, a nice composite between speed/effort/efficiency....I guess that 13 yr. old is kicking my butt....