scene in the movie "2001 A Space Odyssey" where Dave has to spend some 20 seconds or so in the vacuum of space without a space suit helmet
I have always thought that! It was one of the resons I have always marked the film down. It was so patently not possibly for a human being to be in a total vacuum for 20 seconds and live.
Unless I mis-remember, this mistake was also made in one of the Alien series.
--------------------
"I tell you, we are here on Earth to fart around, and don't let anybody tell you any different." Kurt Vonnegut, Jr.