Watch how fast that thing decides it is going to get even. The guy could have put his window up, and tried to, but it is clear he was so panicked he couldn't keep his finger on the window button...and I can't say I blame him.
Rule #1: Never poke a leopard in the ass with a stick, even if you think you are perfectly safe.
Great video. You can hear him screaming. Of all the great cats, leopards have killed (and eaten) more people than any other including lions and tigers.