From my fave dive boat captain in the Keys, as the boat returns to the dive shop's dock:
"I hope yall had a good time today, I know I did (aside to the mate) and thats all that really matters! (Back to the divers on the boat) If you had fun, we want you to go home and tell all your friends and send em down...if you didnt have fun, tell all your enemies, send em down and Ill piss them off too...dont forget the #1 rule in scuba...NO SPEEDOS! The #2 rule...NO SPEEDOS! (pointing directly to the day's offender...and there's always at least one on board) #3 rule...TIP THE CREW!...we went through all your gear and didnt find any cash, people!