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Why do people do this?
I doubt it works.
But I still do it.
I used to get a can and keep smashing it into the ground. Eventually I'd smash a tiny hole into it and drink the fizzy fine spray. A can would last me hours (maybe).
I'll be back with another stunning tale of my childhood this time tomorrow.
I usually do it since I saw it on some top tips show as a child.
on an episode of How2 10-15 years ago.
They used a spoon though, right?
I might be wrong.
This cannot be true.
(I used to do this)
Surely all it does is agitate/shake it up further, increasing the pressure and therefore the chances of it going everywhere?
if you drop it on the ground it'll fizz up to fuck
but if you tap it just right then it won't fizz up at all.
makes no sense.
like touching the outside of a plane before you get on board!
its become superstition and I believe it works...
if you tap a can for 30 seconds before opening, it won't fizz over...or amazingly, if you do nothing for 30 seconds it won't fizz over either!!
There's no scientific explanation, but I've seen people on site doing it loads of times.
I'll relax with a nice can of pop
is that if you stick your finger into a nearly overflowing champagne flute, it stops the fizz quick sharp
Tapping on the top of a carbonated beverage can (or bottle) before opening it may help prevent the drink from exploding out of the can upon opening (although it might not be sufficient). Sparkling or carbonated beverages contain carbon dioxide gas that is dissolved in the liquid by pressurizing the contents of the can. When the can is opened, the mixture depressurizes and the carbon dioxide comes out of solution, escaping as carbon dioxide gas. If there is liquid between the gas bubble and the outside of the can, then some of the liquid may be pushed out of the can with the bubble. The pressure gradient when the can is opened is greatest near the opening and the carbon dioxide at the top of the can escapes first.
If the can has been shaken, then the pressure differential inside the can during shaking will force some of the carbon dioxide out of solution to form bubbles. Some bubbles float to the top and some stick to the sides and bottom of the can. Given sufficient time, equilibrium will be achieved and the carbon dioxide will dissolve back into the beverage. If the can is opened immediately after shaking, it is likely that the beverage will spray all over the place, since some liquid from all parts of the can will be pushed ahead of escaping gas and out the can (hey, bubbles float to the top and these bubbles are under pressure too!). When the can is tapped before opening, bubbles adhering to the sides and bottom of the can may be jarred free. Assuming the can is upright, the bubbles, being lighter than the liquid, will float to the top of the can. Then when the can is opened, the bubbles are already near the opening, so they don't push through the beverage on their way out.
I'll just assume it says I'm right that you're all crazy for doing something so pointless.
I think me and you may have a differing view on what is pointless.
Shaking a can releases CO2 from the liquid. Some of this sticks to the side of the can, and when you open the can, the depressurization causes this CO2 to rush to the exit, pushing any liquid in the way with it. Tapping the can instead dislodges the CO2 and causes it to come to the top of the can as it's lighter than liquid, where it can cleanly escape without causing a mess.
TL;DR version: It stuns the magic soda goblin.