One of my dogs was just put down a couple months ago. Last I remembered of him was taking him to his crate to sleep the night before. Next morning, he apparently had seizures and was in pain (I slept through all that but did hear people in house freaking out later). Family then took him to the vet thinking everyone was in the car but they forgot me in the hustle, but I had to go to work anyway. As I was driving to work, my mom called to say they put him down.
Kind of glad I didn't go though because the last time I went to watch one of our dogs die I ended up being a total wreck for a few days. In this case, I was just kinda bummed out but it was very easy to get over it.