I agree with >>13100 on the idea that there is no need to invent new methods all the time you can just change the context of the event. or character attitude towards what is happening to them.

One fun idea for snuffing is a human firecracker.
let say this is a birthday party. Boy and girl get on the stage with they bellies stuffed with explosives and big roman candles stuck in the butts.
they ignite candles and sing happy birthday while they are burning and just when they end this song, candles finish burning for a moment and they both smile, wink their eyes and explode splattering guts and pieces of colored paper on all party guests.

Another idea is girl butchering herself like maybe selling her limbs whose she cut herself. As a bonus, she cuts them to feed a stray dog which lives in the neighborhood. Maybe she could start with something like finger and end with losing entire legs.
Evelina gets a bit upset for one of meat-girls being ruined like that and losing sale value. but this can be solved by donating her to the animal shelter where she is deliciously eaten alive.