Except this isn't really a good example of a critical failure. A crit failure in this instance would be more like dropping the glass, or shattering it when pushing it against the lever, or tripping and face planting into the water dispenser, etc.. The critical failure is your fuckup, not a random change of what comes out of the dispenser. If the roll is to determine what comes out of the dispenser and there are multiple different possibilities... Usually that kind of roll is done with percentage die/dice, and there technically is no critical failure, just a range of possibilities.
I once spent several days designing a DnD one shot scenario where critical successes/failures would result in absolutely absurd and unpredictable events happening. Called it Bullshit and Dragons, never got to play it with anyone, unfortunately.
We play with a house rule where you "confirm" your crit failure by rolling again: 20 and it's not too bad, you just fumble the action which fails but there's no further penalty, down to another 1 which is the worst outcome that involves some kind of penalty including losing a few HP. If you rolled another 1 on the second roll, you roll a third time to see if you get another 1. Roll three 1's in a row and your character dies due to the nature of the critical failure. Flip side is for rolling 3 20's in a row similarly, your character gets a wish spell (regardless of caster ability). It's entertaining when it happens either way but both are incredibly rare.
I think a even better Critical failure is the water gets Vacuumed up** back into the fridge, and now you are both extremely thirsty and you have a broken fridge :P
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u/Low-Implement9819 3d ago
Ohhh, now i understand what's a critical failure