The image is a scan of a persons back with various medical rods in the back, which was part of the (ALLEGED) shooters twitter image before it got deleted. The blade of grass thing is a reference to an infamous story of Yud about how AGI could figure out another universes physics just by looking at a video frame of a blade of grass bending in the wind.
So parts of his manifesto (which was short) was published, and it was pain that radicalized him, ah well a superpredictor like Yud can’t be right all the times. If only he had the image of a blade of grass that could have been a hint, sadly we did not.
Spoiler for the image link.
The image is a scan of a persons back with various medical rods in the back, which was part of the (ALLEGED) shooters twitter image before it got deleted. The blade of grass thing is a reference to an infamous story of Yud about how AGI could figure out another universes physics just by looking at a video frame of a blade of grass bending in the wind.