Anecdote: I once came up with a joke in my dream and laughed so hard at it that it woke me up (and my girlfriend). I also sometimes speak in English in my dream

Anecdote: I once came up with a joke in my dream and laughed so hard at it that it woke me up (and my girlfriend). I also sometimes speak in English in my dreams although it's not my native language. There's also several stories of famous writers and scientists who had their "haha" moments while sleeping (James Cameron claims the idea behind Terminator came in a dream).