.A reporter from Atlantic magazine checked Haitian Voodoo out..and here is what she found;
Jun 29, 2022 — A popular saying on the island goes, “Haiti is 90 percent Catholic, 10 percent Protestant, and 100 percent Vodou.” Apparently voodou (Haitian spelling) is very prevalent in Haiti. For the curious, here is an introduction...Voodoo initiates are very often taken in
by way of a body of water.
I once had an old preacher who was skilled in exorcisms, tell me that when a possessing demon cannot inhabit a person..they prefer to be in water, where given the proper opportunity, they could again indwell someone.
..And he seems to be borne out by the incident Jesus had with the Gadarene demoniac..where, when the demons were to be cast out, they went into pigs, which they then drove into water.
Here is a 1+ minute video of Haitians being "cleansed" at a waterfall...
https://www.youtube.com/watch?v=BTMs6l7kjdg