Charlie calls Desmond a coward and Desmond attacks Charlie
We see this scene twice in the episode.
Pre Desmond’s Flashback
Desmond: You don’t wanna know what happened to me, when I turned that key
Charlie: Help
Desmond: You don’t wanna know
Hurley: Dude!
Charlie: Help
Desmond: You don’t wanna know
Charlie: Get him off
Desmond: You don’t want to know
After Desmond’s flashback
Desmond: You don’t wanna know what happened to me, when I turned that Key
Charlie: Get off
Desmond: You don’t wanna know
Charlie: Get off me
Desmond: You don’t wanna know what happened to me
Desmond: you don’t wanna know
Charlie: Coughs
Desmond: You don’t wanna know.