Leaping - great thread title, btw!
I agree with the others...I would have done the same thing, felt the same way, had the same reaction (threats of self-harm are scary) and been wondering afterward if I had been conned.
You are wise to look back and review your reaction, but don't be too hard on yourself. You did the right thing, regardless of how anyone else reacted. Be proud of yourself for that. At least someone in his life is taking him seriously!
I've been separated for 7 months and I am still working on identifying my emotional reactions to situations so I can better handle them while "in the moment". I am learning that is a fine art that takes real practice.