When then the second plane flew into the south tower, below the floor Brian was, he was first terrified.

- For five seconds the house rocked west, then for five seconds it rocked back.

Then I felt calm, he says.

Brian Clark describes in detail and calmly how he went down in the south tower.

Suddenly he sees a hand in the masses

In the video above, you hear Brian Clark talk about how he dug up his friend Stanley Praimnath.