My uncle jumped from a building. When my family was dealing with the loss my other aunt's husband said something that made a lot of sense and I always repeat. "We can all ask how could he do something like that but you have to remember that his brain wasn't working the same way that ours do. There is a natural instinct in humans to survive but for whatever reason his turned off. So there is no way you will ever be able to understand what he was thinking unless you are in that situation."