Well, the actor decided to address these rumors head on in a new video entitled, "Jim Carrey: Out to Lunch." In it, Carrey asks his friends, along with a waiter who's serving them, whether he seems like a "stable" individual. Most of them seem to agree that Carrey is totally fine (though it's doubtful the waiter would tell a movie star he's crazy to his face) and acting the way he always does.
You can check out the video here and decide for yourself.
Image courtesy of Getty