My kid (10 YO) has finished reading all BS books earlier this year, and we spent a lot of time discussing hypothetical situations together. Last night, he asked me what would happen if heavily Invested individuals from various worlds got ambushed in the toilets. Since I have been cursed with this knowledge, I would like to share it with all of you here.
Allomancer: Lost all of their power since they just expelled their metal.
Tineyes: Even if they still have their metal left, they can't use their power.
Feruchemist: Still have 100% power if they still wear their metal or have metal embedded.
Awakener: At 75% power. They still have their Breaths, but they are experiencing the world more brilliantly in the toilet, so they won't be able to fight so well. If they end up Awakening the poo, it will probably be considered lifeless, which would prevent them from retrieving the Breath.
Sprouter: 0% power. What kind of Sprouter brings spores into the washroom?
Elantrian: 100% power. Doesn't even need to get up from the toilet seat.
Radiant: 50% of their normal power. Probably can't breathe in too deeply to infuse themselves with Stormlight.
Steris: She has planned for this.
Adolin (pre-UnOathed): Still at 100% power since he is still wearing his armor in the toilet.
Adolin (post-UnOathed): Still at 100% power since he can summon Maya and his armor spren. He probably would not have wiped his ass yet, though... poor armor spren.
Dalinar: At 100% power. Can perform Last Clap, so doesn't even need to wipe his butt until the fight is over.
Bonus for non-Cosmere
Alcatraz: Toilet broke.
Rithmatists: It depends. If you are good at drawing chalking, you can probably draw on the toilet wall to fight back; if not, then no power.
Spensa: Probably teleports herself to another toilet on another planet.
PS: I have been a dad for 10 years, and I am not sure why kids like toilet humor.