I have been very surprised after watching a video (and then watching it again..) of the McGurk effect. It is absolutelly amazing what you brain can do. It is the ultimate test of the fact that what we see overrides what we hear. And the fact that it work no matter how many times you see it, is trully fantastic. Like I said, I watched it a few times, hoping I would recognise the difference, but I still could hear two different sounds, despite the fact that I KNEW that the same sound was played the whole time.

I’m adding a link to YouTube which broadcasts the McGurk effect.