Lifeguard:
Yes, it's full up. I'm afraid I can't let you in until someone else comes out.
Beachgoer:
What are you on about? There's plenty of room!
Lifeguard:
Well, you'll have to take that up with the Fire Marshal.
Beachgoer:
The Fire Marshal?!
Lifeguard:
Yes, you see, if there were to be a fire in the ocean--
Beachgoer:
A fire? In the OCEAN?!
Lifeguard:
Please, sir, calm down. I realize it may be counterintuitive, but if, say, an oil slick were to pass by, and happen to be ignited, everyone would need a safe escape route.
Beachgoer:
Oh, yes, can't have a panicked crowd rushing the doors, can we?
Lifeguard:
Indeed, sir. Ah, that young lady with the inflatable horsey has just come out. Sorry for the inconvenience, sir.