"WELL, I WOULD RATHER LIKE TO STAY OUT OF THE OCEAN. I'VE BEEN THROWN INTO THOSE DEPTHS BEFORE AND I DIDN'T CARE FOR IT. YOU DO REALIZE THAT WHAT YOU'RE ESSENTIALLY ASKING IS FOR ME TO PROVIDE BLACKMAIL ON MYSELF?"

Probably the only way to ensure the strictest confidence would be to keep the jar under lock and key, but he's hardly going to suggest that.