Idlestop,
I think there was an accident prior to those you mention, when the a/c was first introduced. Didn't two instructors manage to get a skid caught under one of the white 'spots' on the grass, (actually a large metal disc) during the ground run after an EOL, and flip over? IIRC one of those involved used to have a sticker on his headset that said "no step" referring to the means by which his colleague exited the aircraft on its side!
BTW how's trix, will you be doing visiting this neck of the woods again?