Getting two thoughts at once

Have you stopped yourself in a sentence because you were about to mis say a word, or say something else in place of a word? Then have you gone ahh or something and then said the word you just stopped yourself from saying. I just find it really funny, because you end up saying what you  trying not to say. Its like instinct or something. Or maybe you say what you were trying not to say because it could cause problems, like an argument. And I think that everyone has done this at least once. It's as if you have two thoughts, and your so excited or scared to say them that you mix them up. An it ends up getting you all mixed up. I don't know why, but I just find it interesting, and kinda funny.