Valerius Maximus has a ton of stories about that...somebody fucks up a completely trivial thing and the king gets overthrown, or killed by lightning, or whatever.
What's interesting is you can see how this influenced Christianity's sacramental theology. All of the sacraments involve proper form and matter or else they don't happen. So for example in Catholicism, if you mess around with the form or matter of baptism, penance or the Eucharist the sacrament never happened.
There was a situation up in Detroit, MI where a priest had to go through the sacraments and ordination again after someone found out he wasn't validly baptized because the deacon screwed around with the form.