Word for going crazy
What is a word which describes when a person loses it, when they reach their limit or pass the tipping point? I'm trying to use it to describe a person's transition from sane to insane. For example,
Dick Prosser's (transition to insanity) was accompanied by a ...
You might use breakdown or crack-up.
How about derangement / derailment?
Dick Prosser's derailment was accompanied by...
How about
Dick Prosser's descent into insanity was accompanied by...