...you are at a waterpark and see a suspicous mole and want to go tell them: "You should really get that looked at."
...you are at a waterpark and see scars and know what kind of surgery they had...Oooo, nice thoracotomy, or, how is that VP shunt treating you?
...you are at a waterpark and admire the nice juicy veins on the person in front of you
...you are at a waterpark and you imagine the worst case scenario if someone got hurt on a ride and how you could step in to help - everyone stand back, I'm a nurse!
...you are at a waterpark and see a poor little boy having a dermitalogical reaction to the pool water and want to just go rinse him off and slather him up in some lotion
...you are at a waterpark and wonder what would happen if there was a zombie outbreak..well, okay, maybe this last one doesn't have so much to do with being a nurse per se, but I'm sure some medical knowledge would be advantagous during a zombie outbreak.