Tropers: The Defenestrator

A not-very-active troper. I enjoy Left 4 Dead 2, trashy anime and manga (seriously, I have horrible taste), and cute.

I'm storing this here, because it's the silliest use of spoiler tags I've ever seen:
  • In Eragon, Eragon is told that magic works according to the user's intent, rather than the words the user speaks. However, at another point in the story, he casts a spell on a small child intending to "shield the child from harm", but messes up the words and turns the child INTO a shield from harm, cursing rather than blessing the child. But... weren't we told earlier that it was intent, not words, that determined the effect of a spell? So, how should the spell possibly backfire if he clearly meant to do something good, only to mess up the grammar?