I have had one experience with tip-over.
Parked on sidewalk (nose-in from entry) (pwr pole center of sidewalk directly in-front of bike), at fav resturant, next to last car in-line in parking lot. Nope, no other spaces around, as lot was full of bikes parked most everywhere a cage could not !
As I was leaving, backing outwards towards parking lot entry (on my right), instead of backing and turning to my left, I backed straight back, and not thinking !
my right foot suddenly touched the ground a full 4 or so inches lower than when on the sidewalk, due to the graded entry into lot from main road
The rest is history.... bike falls past angle of no return towards road. I step out of way and watch it lay down ! A few scratches here and there, but nothing serious.
And yes, there were 4 men, (not bikers) standing in front of resturant door watching and not one offered to help me put her back up-right...
The front of the bike was still on the elevated part of the sidewalk when I put her back up. Quite a stretch ! Maybe that day contributed to my double hernia surgery ?
I always pay very close attention to my parking spot and try to avoid spots that may end up with undesired consequences.......