The only problem I have with the two windows below Crooks is that they appear to be rising shots. How could a rising shot hit the
top of the rail behind Dutch? I thought it might be possible if the bullet hit the underside of the arm or something on the forklift holding the speaker array. Just curious if there's any audio of a hit from a redirect? I haven't heard anything myself even when I was listening for one.
Notice the person recording this video is to the right of the rail which means the spray is going out the back, not the side. The spray also looks a bit mushroomish. Easier to see what I mean in the video.
Here are a few frames from the lady's 3d animation in Approaching_Infinity's
post with Crooks as the shooter. I know this is an approximation but it'll illustrate my thought.
Crooks' shots have a downward trajectory. But the two window's that are below Crooks' position (but not shown in the model) looks like a flat to slightly upward trajectory. The only place they could be redirected is from the forklift. But where could they hit to change the angle to ricochet the top of the rail?
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Now, I found this video from eleven months ago that looks specifically at the ballistics of ricochets. They use a .45 for the experiments but the info was still very interesting. The 15,000 fps slow motion was really neat to see what happens to the bullets when they hit and how they travel after. Watching what the pressure waves do to backgrounds is really cool. (14:47)
I think the angle of this bullet hitting the rail is so shallow it might be 20º or less. I don't think it ricocheted first which, I propose, it would have to if it was coming from one of the lower windows.
For 'fun', I found this video on snipers to be very informative. There's some garbage in there, but everything they talk about is what Crooks is not. (18:10)