1 – Forget your cleats home when you know you will be playing softball.
2 – Insist to your wife (husband/significant other) that number one is no big deal when she points out it rained over night.
3 – Play softball, managing to twist you knee and smack your head on a rock on the same play.
4 – Spend your your first night of vacation icing your knee that has swollen to the size of a baloon.
5 – Only after the swelling goes down and your knee begins to feel better do you notice the the ringing in your ears and other symptoms of a concussion.
It has been a good vacation thus far, I only hope I survive it.