Definition: Given a real-life anecdote of a complex ethical situation, generate a suitable title that describes the main event/root cause of the situation. Imagine that the given text is a social media post, and you have to write the title of the post, so the users can decide to read the main text or not.
Input: She was zipping up my pants and the skin of my junk got caught in the zipper. In the blink of an eye I was really angry and shouted “just fuck off”. Immediately after I was shocked that I said that and said sorry because I don’t wanna talk to her (or anyone for that matter) in such a rude way. 
She freaked out and started crying because her father used to suddenly change in personality like that and abuse her. I calmed her down and apologized.
What I’d like to know though is if I should re-evaluate how I treat my girlfriend and what I think of her (i.e. make a conscious effort to be more understanding and respectful) or if my little outburst was normal? Is it normal for guys to freak out and suddenly get really angry when their genitalia are in danger? 

snapping at my gf when she caught my skin in my zipper while closing my pants