Iron Man/Headscratchers

• If Tony ever has to wear the Iron Man armour for a stretch of several hours, what does he do if he needs to use the bathroom?
  • The same thing astronauts and EOD techs do. The armor has a bladder.
  • Iron Man 2 offers an explanation.
• How does the pilot of the Iron Man suit not become affected by the forces of physics that would typically crush, maim, scorch, liquify, or otherwise injure the soft squishy human inside the suit? This includes the Iron Man armor being hit by missiles and withstanding the force of the missile, or in the movie, taking on the force of a jet plane as its wing crashes against the suit's legs. The whole idea that the armor protects the pilot seems to be closer to a medieval fantasy idea of armor protecting the pilot from outside injury, which would treat everything like a sword or an arrow, preventing injury to the pilot by being strong and durable enough to protect the pilot on the outside. But the physical forces, the force of impact, of a missile or plane or whatever, seems to be ignored, without any specific in-story technology that would negate those physics, such as the armor having an internal forcefield, or a physics-cancelling "inertial dampener"-type component or something.