OK, but If he is in one hell of a hurry to get to that toilet, his body axis is going to be a lot less vertical and more horizontal than would be possible or safe in full earth gravity.
At full speed, say around five meters per second, gravity will only matter much over times greater than ten seconds, and distances greater than fifty meters. Of course, in however great a hurry, one probably would not go that fast inside a house, but one would move fast enough that one would move as if in zero gravity.
Given that Ceres' negligible gravity wouldn't give much in the way of traction, it could be reliably expected that belters would be in the habit of grabbing any fixed object available to facilitate velocity changes.
With the understanding that inadvertent loss of contact with the seat of a commode while voiding one's bladder or straining at stool would be very messy, I would think that the wall-mounted grab bars common in restrooms fitted to accommodate the handicapped here on Earth would be even more prevalent on Ceres, though for an entirely different purpose.
Vertical grab bars would be mounted on the bulkheads at the inside corners of turns and in doorways, with horizontal bars running down the lengths corridors, all to facilitate rapid movement and braking.
And take note (pages 11 and 12) of the vertical stanchions spaced at intervals in the middle of the large chamber where Guy and Fiorella first set foot upon Ceres, which are obviously placed for no purpose other than for people not yet skilled in "the Ceres walk" to get
down from the padded ceiling after having inadvertently whacked their rostral knobs against that thoughtfully padded surface.
The NASA Neutral Buoyancy Laboratory (NBL) employs water's floatation effect to simulate microgravity, but it is easy enough for someone not privileged to suit up and breathe nitrox at taxpayers' expense in Houston to think of circumstances on Ceres as similar to movement in very, very low gravity as if one's body were immersed in a swimming pool, but without water's resistance (drag) to be either overcome or exploited.
It is a helluva lot easier to change direction if there is a surface or other fixed object which one can exploit to push off from, or grasp and pull upon. Even though
H. sapiens took up bipedal ambulation millions of years ago (pretty much giving up the grasping function of an opposable hallux), we still retain a perfectly useful brachiatory ability, especially viable in microgravity.
Or when us naked apes find ourselves immersed in water, which is why rescue training stresses throwing a rope to a swimmer in distress before (or rather than) jumping in a la
Baywatch and swimming bravely out to get strangled and drowned by the flailing victim.
The creators of this Web comic have shown real insight into the engineering exigencies (and opportunities) to be encountered by a civilization that has to cope with both microgravity and the very low gravity fields of planetesimals like Ceres. This is one of the reasons why I myself like
Escape From Terra so damned much.
Well, let's face it. Another key reason is that Fiorella and other characters on the distaff side have proven to be
very easy on the eyes.
I'm old, but I'm not dead yet.
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