This site contains pretty much all the info you need: https://rollsafe.org/

Not if you follow all the harm reduction steps ;) Then you just have a lazy day or don’t even notice it.

That’s a really cool feature. I think some electric Fords can even hook up to your house the same way as a generator.

Also taking too much vitamin C can lead to kidney stones.

Maybe you mean this one: https://youtu.be/hGVVAQVdEOs?t=4m50s

where

That’s called Jamais vu, the opposite of Deja vu ;)