2001: A Space Odyssey (1968)
Crew or equipment visible
Errors in geography
It's entirely possible that the "moon-walk bounce" may be required for any and all walking on the Moon. However, the principle reason for the bounce was the rigidity of the suits when pressurized which did not allow the astronauts to bend their knees sufficiently to take a more nature step. They quickly found that the "lope" they used was quite efficient and comfortable. The suits shown on 2001 were quite different and may have allowed the astronauts a more natural gait.
However, as we learned from the Apollo missions, the LEM (Lunar Excursion Module) did indeed kick up dust (as noted by Buzz Aldrin moments before the Eagle landed). The gases that caused the dust to billow was due to the LEM engine exhaust, not air on the Moon. And the dust billowed sufficiently to cause a visibility concern.
While focused on a mission critical task every effort is made to minimize unnecessary talk (chatter) between all members of the team. This is especially true during EVAs. And whatever you need to say, say it as succinctly as possible. If there was nothing that Frank or Dave could add that would assist, then proper procedure is to remain silent.
It's possible that the food delivery system was designed this way to prevent small quantities of food/drink from being released into the cabin each time they take a sip. Debris, especially fluids, can cause significant problems with electronics on the ship not to mention it's a breathing hazard to astronauts.