"Looking at gun and pictures on wall and thinking"

You were incapable of typing out a proper sentence, and have posted a single frame from a video. Are we to fill in the blanks of your thought process, of your 'thinking'? Are we to do your thinking for you? If so, you are in luck, since you most likely have already have a facebook account.

"If Asli Babbitt was shot in neck I need to take a course on ballistic trajectory."

Or you could just watch the video that this image was taken from. After that, I recommend you stop posting low effort nonsense.

"Can someone teach me about gun trajectory "

Oh look! Another low effort post with a still frame image.

"I was being sarcastic."

Go back to facebook. Deception is not welcome here.