And it's that Tuesday evening back in 1982.

It's a compound curve interior.

We've lived with them all our lives.

Reaction's way down. Hm.

MOVE GET OUT OF THE WAY

If the arm has been removed and you have a phantom, and you watch somebody else being touched, you feel it in your phantom.

Some shut down the self using meditation.

I sometimes have the idea that nuclear explosions are about to be set off in my brain.

She had no control over them.

I'm blind in one eye, and not terribly good in the other.

You ever have hallucinations?

Just a trick of light.

You're having a bit of an acid thing.

We're looking at that yellow box.

These excess currents are our dreams and delusions.

Do they look the same? No.

My transparent blood That's begun to flow on my trembling body

Yeah. Yeah, he's beginning to lose his sense of time.

I know! The sign, the electricity. My brain synapse, it was destroyed.

I'm stressed. I'm having a hallucination caused by stress.

Even the beautiful bumblebee, with its mere one million brain cells, which is 250 times fewer cells than you have in one retina, sees illusions, does the most complicated things that even our most sophisticated computers can't do.

She had no medical problems.

Are you seeing things yet?

It might be that, hopefully, you really do have an insight or breakthrough.

At best, he thought, it had to have been a hallucination a trick of the eye or the ear, perhaps, or his own mind working against him.

Fascinatingly, in the last few years, it's been possible to do functional brain imagery, to do fMRI on people as they are hallucinating.

See, I think it's not really about impression, making people fall for a really perfect illusion, as much as it is to make I usually work at the lowest threshold of visual illusion.

She said, Who is this Charles Bonnet?

She'd lived 95 years and she'd never had a hallucination before.

They seem to come from the outside, and to mimic perception.

But the fact remains that I saw I certainly saw right down his sleeve But did you are you sure?

Then, when you wake up, you'll never be bothered by them again.

And then the handsome young men disappeared.

And if they do mention them to their own doctors they may be misdiagnosed.

The one after that, I stood on top of a hundred foot pillar for 36 hours.

They don't seem to be under our control.

Well, I've more or less said what I wanted.

Does this feel like a hallucination?

His vision was pretty poor.

Hypnotic illusions don't tear people apart.

She didn't mind the cartoons too much.

So I'll show you what I mean.

In particular, the notion is that if you see things or hear things, you're going mad, but the psychotic hallucinations are quite different.

NARRATOR A chance meeting. A thousand ghosts are stirred.

And she has a sense of humor.