The Pressure Suits

Why do astronauts wear suits even when they're not scheduled for space walks? Because you just never know when an emergency could arise.

Example of senility.http://img638.imageshack.us/img638/2779/paintx.png

To be fair, the further they go, the more molten the rock and metal.

My problem with the EVA scene and suits is two-fold.

Firstly, under the pressures described, pretty sure they would hardly be able to move, but they were functioning as though under normal atmospheric conditions.

And what the hell were the big transparent faceplates supposedly made from? Sure wasn't the invulnerable stuff. At very least, make them just big enough to barely look out from, instead of the silly Hollywood need to display the actors' faces. Hell, for that matter, surprised they didn't make them giant glass bubbles to show their hairstyles too...

But more in keeping with the technology of the movie, the suits should've been solid Unobtainium (lol) fitted with the same navigational tech for the ship.

Mostly though, those giant, thin, transparent faceplates would've been exceptionally vulnerable to the heat (much less pressure), and their heads would soon overheat, which might've been an interesting limitation to use in the story, as long as they were embracing the ridiculous.

"I like to watch" Chauncey Gardiner, 'Being There'

A shard falls from the "ceiling" of the giant geode, slices through the top of his helmet and into his head. Shouldn't he have been crushed by all the pressure entering his helmet?

Exactly. And why did they bring an entire crew of engineers and scientists who designed the ship. All they needed was bringing 1 pilot and maybe, just maybe one more navigator/technician. That's it.

I suppose you are correct. That is, perhaps # 793 of the vast list of utterly insane things that make up this movie. The entire film is a structure made up of individual points of insanity, orbiting a nucleus of stupidity and forming a sort of ATOM of Awfulness.
Not,that I don't like it...