I have battled vicious depression for the greater part of my life. The worst day was my 32nd birthday, last December 12th. I had a falling out with two very close friends. I spent the greater part of that night (3 hours or more) pacing between the living room and my room of my 3rd floor apartment, with the windows open in the dead of winter, looking out the windows trying to figure out the best trajectory to ensure my death. Thing is, there are thick bushes at the bottom everywhere, so in the end, it appeared I wouldn't be successful at killing myself, but would certainly paralyze myself if I jumped.
I do not take heartbreak well. Luckily, that was by far the closest to an attempt I have ever made. Other than that, depression has at times grounded my life to a halt of all function.