Lit-crit question

Is there a name for the phenomenon in some narratives where the bad guy is killed, not by the good guy, but by the bad guy's attack on the good guy backfiring? (I'm sure you can all provide your own examples so I won't include any spoilers here.) 'Cause I'm getting sick and tired of it, and I'd like to be able to denigrate it by its proper name.

Lit-crit question

Is there a name for the phenomenon in some narratives where the bad guy is killed, not by the good guy, but by the bad guy's attack on the good guy backfiring? (I'm sure you can all provide your own examples so I won't include any spoilers here.) 'Cause I'm getting sick and tired of it, and I'd like to be able to denigrate it by its proper name.