Everything that you swallow enters the stomach from the contraction of the muscles of the esophagus, and not from the force of gravity. So it can be done, but the water can go up the nose, so you need to do it carefully.
(Don't do this at home, kids.)
In the eighth grade, we were told in the Biology lesson that the esophagus contracts in waves, so that food will enter the stomach like in an elevator if a person is standing on his hands / head.
At home, my friend and I decided to try an elevator ride. The candy arrived successfully! But it didn't work out very well with water. The problem is that the nose and mouth are connected and the water has taken a different route.
I ended up choking and laughing.
Ah, school days!
It is better not to do this, especially when drunk, especially without support: D
I do not advise you to repeat, it is life-threatening ..)
Attached video :)
A whole glass is probably very hard to drink. But a glass of cognac, standing on his head, my husband calmly drinks)) This number at parties is usually a huge success!
Most likely nothing. Our body has a kind of valve that covers the stomach so that its contents do not "pour out" back when moving. The worst thing that can happen is that you do not have enough air and because of the spasm you will choke. And even then the liquid will most likely go back, because at the same time your body will be tense and the abdominal muscles will try to "push" the incoming water.