The end of the conversation

You know how sometimes you walk into a room or house or building or whatever and catch the tail end of a conversation and think, "Wow, I wish I had heard the rest of that." You know the ones I mean...people are laughing hysterically at things and everything the speaker says brings on more gales of laughter.

"So I picked up the leash and it was covered, just covered in chocolate."
pause while everyone else collapses in laughter while you think, "Huh? That's not funny."
"Sam came running back, tongue lolling, tail waggin with that look on his face that just says he is pleased as can be."
""hahhaha HAHAHAHAHahahaha"
huh?
"Well, needless to say, the NEXT time I need..."

And you think, wow, I wish I had heard the beginning. Everyone loved that story. And the device is used a lot in movies, too, where they artificially try to show the camaraderie of people who have hung out together for years, know each other's families and birthdays and pets. When it works it creates an artificial reality to the movie but when it doesn't you get Ladder 49 where it feels like what it is...artificial, forced, and you don't feel the need to have heard the start of the conversation.
Kind of like what happened today where I walked into a room to hear a guy saying, "So they drilled a hole in my penis..."
Now, there are some conversations where yuo not only don't want to hear the beginning, you don't want to hear the part you heard. Let's file this one right there. But you are welcome for me sharing it with you.