If I throw something at your head and it hits you in the face, was it because you did something irrational?

No. Maybe the throw was too hard. Maybe you weren't paying attention. Maybe you can't see, or maybe your arms don't work the way other people's do. Maybe you felt something coming and didn't know what to do and panicked. Maybe you like getting hit in the face. Maybe I threw it really softly, and you were paying attention, but you've never practiced or tried to block/dodge a moving object and it hits you on the nose.

None of those situations are irrational. The only thing irrational that could occur is thinking it happened because of something that couldn't be explained, or by maybe trying the same thing over and over again and expecting different results.