Electricity through water can injure a person?
I do remember MythBusters asking a similar question: can urinating on a live track on a railway kill a man.

First question is how the water is travelling: if it is anything other than a continuous, unbroken stream, there is no conductive path, and so there will be path for the electrons, and so no electric shock. If we assume that the stream is continuous, then, as water can conduct (depending on your water, conductivity varies), we have a path due to water.

Then we need to work out how the electricity will complete the loop. The man is one part, the water is another, but the electricity is trying to flow somewhere. If the man (woman or non-gendered entity) is insulated from the "somewhere" you have no reason for them to get shocked. On the other hand, if they're barefoot on damp ground, they could well conduct to ground.

So the answer is: yes, if there is an unbroken path. Which is a pretty fundamental rule in electronics.