Once every few years, I seem to have to relearn that having naturally darkish skin does not make me impervious to sunburn.
On the first morning of the trip to Cabo, I took the boys down to the beach; none of us had sunscreen on. Michelle had the bag with sunscreen and was supposed to be right down, but she got sidetracked trying to find a live network connection for her laptop.
Of course, I was well protected with my extensive base tan after a Seattle winter (not). As a result, the three of us were unprotected in the Mexican sun for about three hours. By the time I realized there might be a problem, I was good and red. That evening, I could barely sleep for the pain. (Somehow, the boys managed to escape serious burns; Andrew (9), in particular, just got a little more freckly.)
Two or three days later, my face started peeling in earnest. It was pretty horrific. Michael (6) started peeling a bit too, although he was more excited about it, thinking he was shedding his skin like a snake (he's clearly a Slytherin...).
As the trip was winding down to the last few days, I could go outside again without feeling the searing heat reburning my skin. Must remember to be smarter next time...