Both croaked.

A man came home and found his wife in bed with another man. He challenged the
stranger to a duel. They walked into another room and closed the door. Then the
man said to the stranger, "Why should any of us die? Let's both shoot into the
air, then we fall to the floor and wait. She will sprint in. To whomever she
will rush, let that man have her." The stranger agreed. They both shot into the
air and fell to the floor. The wife rushed in, looked at the two bodies and
shouted, "Darling, you may come out, they both croaked."