Thanks, interesting.

Wasn't aware of the "pantyhose" friction burn problem . Still, I suppose, in an emergency it is probably the least of your worries...

The Upper Deck of a 747 is particularly interesting - seems so much higher than the main deck (and the slides, at least on the diagrams, appear much more scarey).

Think you are right - before you have a chance to worry about height/steepness, you are pushed down the things.

In a real emergency are there every problems with people landing on top of each other (i.e. going down the slide too close together)?

Boo