You missed one...
I think you guys missed one in the Honda civic transmission call. The guy said he shifted into drive, not any thing else, and you didn't confirm that specifically which is an important detail. If the shifter did say it was in drive, there could be something wrong with the linkage, in which case it could happen again any time and that's pretty dangerous. If the caller doesn't confirm actually having shifted into reverse, I'd recommend getting that checked out!