In the early 80's was working in labor/delivery. A baby was born with its heart on the outside of his chest. It was a natural birth. We just stared at that heart for what seemed minutes but could have only been seconds.

The baby was fine, just an opening in the chest with the muscles protecting the valves. The baby was flown to neonatal hospital, surgery was done to crack the chest and the heart put back inside. The baby never had one complication.

That was the weirdest, craziest and mind boggling thing I ever saw!