I haven't seen the episode in question, but from what I understand people be can electrocuted/drown from swimming in water with current running through it. It i

I haven't seen the episode in question, but from what I understand people be can electrocuted/drown from swimming in water with current running through it. It is for this reason that it is not recommended to swim in marinas. See e.g. https://www.electricshockdrowning.org/esd--faq.html https://www.electricshockdrowning.org/esd--faq.html