*POLL* Have you ever had a truly legitimate reason to hit you parent(s)?

[Shockwave]

In light of the other thread, i was wondering how many people had a legitimate reason for hitting your parents. Things like your dad molesting your sister, chasing you around with a pipe wrench, beating up your mom. I'm talkin serious issues, stuff where you were no longer dealing with your father (or mother) but a criminal based on his actions.