In the movie Rocketman when they are all outside on mars, SOMETIMES when you look at their glass over their face on the space suit, it is gone and SOMETIMES it is over their face. I mean it is sometimes off on Mars. If that was real, they would be DEAD!
A note to "Case Dawg" you most not know a lot about Mars, because Mars has several large canyons and many small trenches. A note about the slip up if you didnt have your protected visor down you would not die you would get severe, severe burns with a possibility of dying but they just wouldn't up and die.
Come on guys. Mars has a mountain that dwarfs Mount Everest, and a gorge that dwarfs the Grand Canyon. With such characteristics as these, I'm sure they could find a cliff or two on Mars.