You and I can agree to disagree on that point.
Correct about surface tension, however knowing where the rocks or sandbar are located helps overcome that problem.*
That's given the person was actually dead and not just in a coma. It was common in the 19th century for the rich to want both a window in their coffin and a string to a bell should they be interred alive.
I believe the perceptions don't match science. Ergo, either they are false stories or, as pointed out above, the perceptions were mistaken. Flood stories are common in many cultures yet you only bitch about the Christian one. LOL As for Passover, it's not uncommon for explanations of strange events to come after the event. One explanation I've read about is that Egyptian first born sons often slept on the first floor near the door as a guard while the rest of the family slept on the roof for comfort and security. If a seismic or other event produced a layer of gas such as CO2 or methane, it could kill those sleeping on the ground and not those on the roof.
*A rabbi, pastor, and priest are fishing from a boat on a lake. The priest tells the two he’s hungry, so he steps out of the boat and walks across the water to land, where he claims his snack.
Shortly thereafter the pastor decides he’s thirsty, so like the priest, steps out of the boat and walks across the water to land, getting a bottle of water.
The rabbi seeing this decides he could go for a snack and a drink, and tries to do the same as the pastor and priest. As soon as he exits the boat, he immediately plunges into the water.
On land, the pastor tells the priest “Maybe we should’ve told him where the rocks were?”