Debunking the Grassy snow job and proving film alteration

[Albert Doyle]

There's motion within the single frame. Are you sure you aren't capturing the intact head at the beginning of the frame that lasts until the end of the frame and looks like it is still intact but isn't? It's sort of a image 'drag' within the single frame itself. This could account for what looks like an intact head at the same time as a blood spray.