Or simply Happy Endings?

I accidentally ran into a car driven by this really short guy.  He got out and declared "I'm not Happy!"  Apparently he wasn't amused with my reply...

Not happy accidents, but do believe in
 
 

I even believe there are simple, happy, accidental endings.
( an example; the bassist doing a nice, simple hot lick at the end of the tune...for a simple, happy, accidental ending...
because he missed the ending with the band...again. But the happy drummer was on top of it and backed him with a drum roll and cymbal crash...and every one is simply happy it worked out and the crowd never knew it wasn't planned.) So yeah...I believe because I was there...many times. As the guitarist I sometimes hit a big power chord with the cymbal crash and would raise the neck and everyone would know that when I slammed it down they could all join in for a  power hit and quick mute for a dramatic, simple, happy, accidental ending.
 
Where's Bubba when you need him?

Can't talk now. I'm slapping a big fill on the end of Spacey's ending, causing the rest of the band to try to anticipate the cymbal crash at the end so we can pile on again. As the last chord dies away, I'll throw a quick floor tom roll on it, just to get in the last word. 
 
This is how some song endings last longer than the songs themselves. 
 
All I know is that, someday, when Bubba meets his end, not only will the average IQ of the human race skyrocket, but many people will be very happy.

Awww....ye old floor tom tom roll ending...sweet. Your hired!

I once knew a lead guitarist who had a long standing feud with his rhythm guitarist. The rhythm player had this nervous habit after a song had ended where he would strum this one pattern during the applause after each and every song. It drove the lead player absolutely insane. I went to see them play one time and you could see the tension build on stage as the gig wore on. They'd hit the big ending of a song, cymbal crash, power chord, and all. The sound would fade away and a smattering of applause would wash over the crowd. The rhythm guitarist would strum his little pattern and from the back of the room, I could see a vein pulse on the lead guitarist's forehead. After about the 10th time that this happened, I could hear the lead player (off mic) screaming at him to knock it off. 
 
It was the best part of the show. I looked forward to the time in between songs to watch the drama escalate. Each time, I thought, "This is it. He's going to lose it." Somehow, they managed to finish the show without someone getting the business end of a Strat across the face. 
 
I talked with the lead guitarist afterwards. It took him several hours to cool down and he dissolved the band a few days later. I think of that rhythm guitarist every time I hear a band fail to end a song together. 

Yes.  It has happened to me on occasion, when writing a song, to have hit a chord I did not intend on hitting....then realizing that it is the perfect fit for the pre-chorus or chorus transition.  
 
As Michael has mentioned, at the end of a song.  Same thing, hitting a note or chord by accident and it adds a perfect tension that I did not plan on.  

I guess the Cajuns started it?
 
Now I might have it wrong- it's been awhile since I did the group thing- but I recall it didn't matter what key the song was in if it was Cajun then after it ended they would hit a C major chord.
 
Maybe that rhythm guitarist was just a Cajun Bubba?? lol

The key change in my new tune was an accident (I started playing Bm instead of Bb on the keyboard), but it works really well. I like it when stuff like that happens.