Penn and Tellers blow out went FORWARD. They shot from BEHIND. Jackie went BACKWARD, because he was shot from IN FRONT. Its not that complicated.
WATCH THE VIDEO AGAIN.
Particles of the melon do fly backwards, the majority of the rest of the skull and brain matter fly FORWARD to the FRONT OF THE LIMO.
Just like with the melon.
Just like with JFK’s head.
Watch the videos in post 69.
All the evidence and re-creations PROVE THE SHOT CAME FROM BEHIND.