GARY BUSEY ... WANT ... BRAAAAINS ... BRAAAAAINS!

Looking like he's filming an episode of The Walking Dead, Gary Busey was in full-on zombie mode when our photogs spotted him roaming around the airport on Thursday.

Nice metal briefcase, Buse' -- you pack some travel-sized (but still ultra confidential) brains for your trip?

The 71-year-old actor, who has clearly seen better days, made his way through LAX looking like he was on the hunt for brains -- but maybe he was just hungry for some in-flight peanuts? He certainly scared us, so we imagine he was probably scaring the high-flying masses with his gaunt and ghastly appearance.

It's a sad day when you are looking to fly the friendly skies -- but instead you get seated next to the Busey.

Before he got bitten -- Scary Gary starred in The Buddy Holly Story, Lethal Weapon, Point Break, Under Siege, and The Firm.

It's so sad that we've lost yet another star to the zombie apocalypse ...