For most people yes it is impossible the stomach just is not large enough to hold that much, however some people have larger than average stomach capacities and can. Generally the stomach is only the size of your fist but expands.
it depends on the drink
when you see how fast you can drink a gallon of milk could include severe vomiting
Not without puking, so don't try it.
You shouldn't try to do so. Vomiting is your body's way of attempting to prevent alcohol poisoning as a result of consuming too much alcohol.
I have bile related headaches many times. The solution that works for me always, is to drink about a gallon of water and induce vomiting.
Yes, eat less
it depends how much you drink...like if you drank a gallon of salt water, yes you would puke your guts out
yes
it depends on who you are and how your body reacts to the alchohal some people can do it easier than others
the banana and sprite challenge is where a person has to eat 2 bananas and drink 2 cans of sprite without vomiting or burping.
While vomiting it might be helpful to drink a glass of water but I think is better not to drink water because it may cause you to make you vomit even worse so It would be better not to drink water
There are 16 cups for every gallon of water. There are also 128 ounces in a gallon.