I'll go first
My MIL named my husband Howdy. Howdy G. The poor kid doesn't have a middle name even as an option. Then she asks me if we would consider a namesake. After the initial reaction of my pregnancy was "OH."
On my wedding day she corners me and tells me "This is my family and my terriorty and you better just watch your step. I'm not afraid of anyone."
You girls probably saw my post about the PNP from the '80's.
My SIL rode from her wedding to her reception in the back of a horse trailer.
My MIL once tried to punch me in the face because I said "Wow, I didn't know the whole famly was coming" when the whole whitetrash bunch showed up after my husband was in the ER because he rolled his vehicle.
Those are the biggies I got right now