Ok, seriously? You were too lazy to throw away a soda can, so she made you do it, even if the knife thing was a bit overkill, why didn't you just, oh I dunno... Throw the can away in the first place?
And the grime thing, you could have just offered to clean it or something, really. Just endure their complaining, and calmly do as you're told.
I mean wow. Seriously would it have been that difficult? Jesus, some of the people in my generation are way too babied and expect things to be handed to them nicely on a silver plate. Once children reach 13, I would hope they would have realized that that is not the case. I guess not, unfortunately.