I'm still trying to figure out how that could be a legit code. Jet skis, of course. But ... ah, while trying to see if anyone else had a brainstorm, I found a better one that eliminates a lot of possibilities:

V90.27XA: Drowning and submersion due to falling or jumping from burning water-skis, initial encounter

Got that from http://skepticalscalpel.blogspot.com/2011/09/icd-10-codes-dr..., which suggests:

I have come up with an answer. Someone, possibly an actor from the Jackass series of movies, sets up his water skis on milk crates in the back yard. The skis are positioned over a kiddie pool. He mounts the water skis while an accomplice sprays them with gasoline. The skis are lit, and the man jumps or falls from the burning skis, submerging and drowning himself in the process. Luckily there is an ICD-10 code for that.

Maybe we're being trolled? You know, there are trolling motors, but they're (all?) slow, battery powered ones to avoid disturbing fish, not at all suitable for water skiing.