I watched the video...can understand people choosing not to, but I did just to see how people reacted.
A few notes:
1. I don't know if it was respect for the mosque or what, but mad people seemed to avoid trying to use the window to escape
For those of you not watching the video, the mosque was set up like a giant open space at the end of a hallway with two sides. So, like a T if the top of the T is a giant rectangle.
The shooter starts popping off in a hallway, and by the time he gets to the giant open space, everyone is huddled in the four corners of the room next to windows. Most of the video is him methodically shooting into the mass huddles of people. At some point, he goes back to his vehicle to grab another gun, comes back, and starts again...literally shooting people in the huddle in the head. He even says "I didn't even have to aim" to the live stream at some point.
My takeaways: Playing dead is a last resort in these situations...shooters are doubling back to kill people who do this (not just in this shooting, but in other shootings as well - this happened at the Bataclan too).
Also, if I'm in a space with no exit like that, and i hear gunfire / screams, I hope I have the presence of mind (no disrespect to the dead, this is in all seriousness) to recognize the less natural exit (in this case, the window) and take advantage of it out of an abundance of caution.
2. The killer genuinely did not have an ounce of empathy for his victims. His breathing was slightly elevated but that was it. He livestreamed this. I was wondering why they are trying to erase the video from the internet, and after watching, I get it. It's truly terrifying in part because the guy sounds so "normal". I truly fear copycats as a result of this - I don't think there's been anything like it.
All this to stay - stay safe out here. I hope this doesn't become even more common than it has recently, but all signs point to it. Mind your exits in public spaces. Don't sit with your back to doors and don't be afraid to dip the fukk out if something doesn't look, feel, or sound right. If you're in a place where you're allowed to carry - carry. shyt's about to get real.