Break The Vase

IOUGHTTOKILLYOUFORTHATYOUSONOFABITCH

"Breaking the vase" is a phrase that means to unintentionally do something that greatly displeases another person. For example, Guy comes in and accidentally obliterates something Ava holds dear. Either Ava... This is a very largely played reason for why one character hates or fights against another. In fact, it's one of the largest UnTrashes in history, probably  the  largest.
 * Evolves into a Beast Fueled By Rage And Hatred,
 * Remembers the Good Times she had with that item, or
 * Commences The Loathening

Contrast to Break The Vase And Laugh where the destroyer intends to grief their victim.