If there's a contact on the Newcastle player (which I think there is) I'm stunned that folks dont think it's a pen.

.
"A direct free kick is awarded if a player commits any of the following
offences against an opponent in a manner considered by the referee to be
careless, reckless or using excessive force:
...
• kicks or attempts to kick"
He is attempting to kick the ball, the Newcastle player nicks in ahead, defender attempts to pull out of kicking attempt and is just not quick enough to prevent the kick on opponent. I think the uproar here is the punishment (PK) seems harsh for what was clearly not intentional, but for me it's a pen.