I don’t know why people do this. I have seen kids, teens, some elders do it too. Some do it on purpose to annoy others, some accidentally with a worried look on their face.
The other day I was in the train, and as I have observed before, trains are a fun place to observe people. Even if they are sleeping, there is something funny going on somewhere… so, I was in the train, and there was a mom, son and daughter sitting bang opposite me. The kid removed a 1 litre bottle of water which was half full and the bottle started making crackling noises. He obviously had covered the opening completely .It got to the point where the kid who wanted to do it intentionally seemed confused for some time and then worried. I think he got stuck and didn’t know what to do. He started pulling, I don’t think it was easy coz he looked scared. His mom hit him and told him to stop doing it and when she realized the gravity of the situation, helped him pull it. he threw some air back and I think the bottle cranked and finally left him free and as soon as this happened, his mom gave him a jhaap and he just sniggered.
It is not just kids, recently I saw a very mature looking guy do it. I don’t know id if it was intentional or not, but I am trying to understand the reason. It will be completely wrong to say that I have never drank like that earlier, but I honestly don’t remember why I did it. I guess it was to experiment… I found the choking nothing close to pleasant or amusing. Still don’t understand why people do it.