Hahaha, I once had a brother in law that was almost that heavy Sir Johann.
He had polio as a child and his mother spoiled him so much that she neglected her other children.
She kept on spoiling him into adultdood and eventually he was so fat that he could only enter a door by turning sideways.

The doctors told him that if he lost weight, that he could walk normally, but he didn't want to put down his crutches, as who would spoil him then?
Eventually he died of a heart attack.

I don't think we will ever know everyting my friend, as every day over the ages new discoveries are made.
Mother nature can talk in all languages, but so many of us cannot understand her language hahaha.

Here's an example of her language;

You climb into a tree and you go out on a thin branch. She tells you in your own language that the branch is going to break, but you ignore her and you carry on.
Afterwards you have to find an excuse for the doctor hahaha.

Cheers and blessings!