I think it's not a real image.

Anyway -- no we don't waterski behind the tri, although people have done it (with other) as a stunt. Our boat is more of a fast cruiser anyway, definitely not a racing tri.

I posted this image a few years ago, taken as we were doing 14 knots over flat water. Yes it would be possible to water ski at that speed. We don't go that fast very often... we're generally cruising around the 7-12k ranges when the wind is 10-20k. I reef above 20.