Water jet...
The little stream you see shooting into the air is from a small plastic insert into the top of the jet nozzle. They were designed for skiers to be seen by boaters. I think, when skis first came out, boaters were running over them like cars over motorcycles.....
The spray is called the "rooster tail". From what I"ve read, it appears there isn't anyone who wants this so a kit may be hard to find. The reason is because at low speeds, with the wind at your back, you get soaking wet. I did read about someone that wanted the rooster tail so he took a 1/2 copper elbow (90*) and soldered a copper brace on it to attach to the nozzle. I dont' know if it's worth all the trouble but I can see it being done.
:agree: with Robin. This is a kit I'm sure you can purchase somewhere....:cheers: