Mine was not witnessed by anyone other than family.
We were heading on a trip early one morning. We had packed the night before and laid out our clothes, so we could just get dressed, brush our teeth and leave.
I pull on my pants and the button pops off. I grabbed the button and needle and thread and we left.
I sat in the car while DH drove and sewed on the button, while wearing the pants.
We got to the ferry and I undid my seat belt. Yep, I had sewed my pants to the seat belt! I had to remove the button, then resew it to my pants only before I could get out of the car.