You could in theroy and some have but it is usally only one to two steps you culd not run fast enough to maintain the dowforce required to hold the body to the wall for any length of time.
Doesn't even matter how fast you run - if you are running up a vertical wall for any length of time over a second, gravity will still act downwards causing your head to rotate backwards and tumble over (possibly breaking your neck!)
That was why it was said in theory. And the ones that have done this only did it for 1 or 2 steps. I know gravity would take over and you would fall. Thanks for pointing out the obvious.
Probably you could manage it if you had a large enough coefficient of friction between your feet and the wall, and you kept your center of mass close to the wall. Geckos do it, so it must be possible.
I don't know whether it is possible, but it is so much fun on the walls of a gymnasium, especially when you are asleep.
True, although I presumed he was talking about us as humans since it's fairly obvious that a lot of animals can do it
I don't know. I think you're wrong. If you have shoes with an appropriate coefficient of friction, and are able to keep your body sufficiently close to the wall, you haven't explained to me what physical principle prohibits it, nor have you explained why it's physiologically impossible to stay upright. It may be that the core muscle strength you'd need for this is just not possible in humans, but I don't know.
Shoes alone would not hold you against a wall. You'd need special gloves, too. But to actually run? Crawling, sure. But not run. Not really.
Geckos do move pretty darn fast up a glass wall. But the gait is probably not a run because in a run/gallop gait, all feet leave the surface, and as no physical theory allows action at a distance and no biological field is going to work over macroscopic distances like limb-surface separation. So it's probably just a fast crawl/walk gait.
Didnt say a principle forbade it I would certainly bet that the core muscle stength is too low in humans to ever wall walk. But even that was not my point - all I said was that running as fast as possible to create a huge downforce will not enable you to wall walk. Even in theory.
