It's quite an interesting question but I suspect mikko has already given the correct answer.
I know what you're saying though Scubapig - when our brain perceives sensory information as conflicting it will "explode", and here's another experiment for you just to prove that point (and less blood on your shoes too lol mikko):
Place your middle finger over your index finger so that they form a cross. Place your nose inside the V-space which is formed between the tips of these two fingers (oh and leave your nose on your face I might add, no need to pull it off for this experiment, just bring your fingers up to where your nose is;-)
Now, slide your crossed fingers up and down the bridge of your nose, with your nose inside the angle that is formed by the tips of your fingers. How many noses can you feel? Spooky, huh.