I have been shown a pattern that stops that happening.
tune bottom E octave.first machine head. then thick E, and follow the machine heads down to the top Es.

Strict instruction given to me was follow this pattern do not start tuning any where.
So far som good.
Thanks Folks.

The G string is a sod but that because of the high tension.
regards Pierre.
I have not experience it yet but I bet when that G string snaps it can whip you.