We all seen it in the movies and TV: One shot to the chest, bad guy flies 10 feet backwards, killed instantly.
This guy shot himself at point-blank range and took him 25 seconds to lose vertical.
And yes, he probably did not hit the heart and or the major blood vessels coming out of it, but that would have been what? Eight seconds? perhaps nine? And this is somebody wanting to die alone, no desire to take people with him. Twenty five seconds is a long time to do lots of mischief.
You have learned something new today. Prepare mindset and train accordingly.