They don't really happen to me anymore, if I'm feeling pretty bad, I'll just do shit that makes me feel better. Although it probably helps that I rarely do anything other than LDAR, so it's not as if I experience anything which will cause me to have a breakdown.
The worst one was probably when end up getting hospitalized for repeatedly injuring myself to the point where I needed medical treatment and admitting that I was suicidal, which was around the same time that I quit school, both for the same reasons. I just couldn't take it anymore, everyday I was mocked and harassed endlessly, I was assaulted pretty often as well, which lead to me getting in a lot of fights. Considering that I would usually get punished at least as much as the instigators, it probably makes no difference that I quit, as I likely would've be kicked out eventually anyway, there is no doubt in my mind that my teachers were happy to have me gone.