The subject of a DVD passed out at a recent NCNAAPT mtng.
Here's more from The times (Lon.)
"Both scenarios have now been proved to fly in the face of physics.
Research has shown that it is impossible for people to sink into
quicksand much beyond the waist but it is equally impossible to pull
someone out once they are stuck.
"The research, led by Daniel Bonn, of the Ecole Normal Supérieure in
Paris, gives the lie to dozens of famous film scenes in which the
protagonists drown or are rescued."