Robin Williams

Make... Oh, pneumonia is really quite, quite choking.

And the director, who was at the bottom, of course, was shouting up.

And he said, say something.

Talk to the camera about what it's like, you see.

So I looked at the camera and said, this immense number of bats flying around here in a panic, not one of them is colliding with the other.

Nor indeed am I in any danger whatsoever of being hit by them.

And they don't fly into your hair or anything because they are so clever with this ultrasound.

The old fear that people have of bats getting caught in their hair is actually quite unfounded.

And the director said, terrific, cut.

And the bat went, boom.

and the bat hits him whack on the head.

The film's called Life on Air.

Gorgeous stuff.

David Attenborough spent lots of time filming anthropological stories, and you'll see his vast collection of material from around the world on the show.

He also records in his book Life on Air how open-minded you need to be about people and cultures which are unfamiliar.

Part of the BBC tribute to David from my science show special...

And you can hear it in full online.

Just go to our website.

He's now 100.

And when I phoned his London home number last week for advance good wishes, his daughter Susan said, well, I'm sorry, he's at work.