Bob and Karen are unloading their gear back at the dock following what can only be described as an extremely satisfying and fullfilling day of diving. They're both smiling and laughing as they talk about the numerous creatures they saw and how compatible they are as buddies.
Bob notices that Karen is maintaining eye contact more and more, and is becoming rather flirtatous with her various gestures and lingering contact with various parts of Bob's body while she's exchanging chit chat. Having met in the dive shop just prior to the dive, Bob feels that things are going quite well.
"Karen, would you like to come back to my room and log our dives together?"
Karen enthusiastically gives Bob the confirmation he was anxiously awaiting, as she nods her blonde hair is tossed around her head giving her an almost angelic appearance. Bob's mind drifts to the possibilities when suddenly a car screeches to a stop next to them.
"Bob how DARE you speak to another woman while I'm waiting back here at the hotel with our little ones! Johnny crapped his pants again and Susan's been crying because I can't get reception on the TV in the room and she missed Barney again! Get your ass back here before I lose my God Damn mind!"
Without thinking Bob reaches for the shealth on Karen's leg and pulls out her 12" serrated edge dive knife and plunges it into his wife's chest. Her screams become gurgles as blood and froth escape her mouth much like an embolized diver, and she slumps forward in the drivers seat of the now bloody sedan.
Karen screams and yells "Help, Police!" But the quick thinking divemaster is already on his cellphone with the emergency dispatcher. Bob comes back to reality realizes what he's done and he makes a run for it down the street. Two of the divers on the boat chase after him and tackle him and bring him to his knees. It was a rather easy task since Bob was so flustered at the thought of asking Karen back to his room that he forgot to remove his fins.
The divers hold Bob until the police arrive but it's too late for his poor wife who has expired in the Avis rental car at the dock.