That. Jetskis are fast but mostly a 2 dimensional thing. You get bored and look for things to do to help show the relative speed to your lizard brain. Playing off the big bow wave on a barge would seem to be an ideal pursuit, right? It is not turning or doing anything fast, so it is a stationary wave to play with, so to speak.
if you misjudge that and highside into the side of the barge, that is about as sudden a stop as your brain bucket is going to get. if you happen to end up in front of the barge bow it will grind you under for the full length of the barge before you pop up by the tow boat. They do not push things to the side like the bow of a boat. We are aware of that " feature" working on the water.
You can end up in deep shit in a strong current with a moored barge, for example. They had to rescue a workboat from in front of a barge in Agate Passage when my old employer was doing some bridge work there. It is not long from the fucking around to the finding out.