As a former football player who has carried a football more than 4 000 times trust me I did not go into ballroom dancing with my body being 100 percent with no aches or pains or ailments coming with me. When you're dancing you're doing stuff that your body's not used to and so you start to aggravate those old injuries.
A pun does not commonly justify a blow in return. But if a blow were given for such cause and death ensued the jury would be judges both of the facts and of the pun and might if the latter were of an aggravated character return a verdict of justifiable homicide.
Courage enlarges cowardice diminishes resources. In desperate straits the fears of the timid aggravate the dangers that imperil the brave.