Gary Busey -- I'VE SEEN GHOSTS!!!! ... One Popped Out of My Soup

GHOSTS ARE REAL ... and they love soup ... so says master of all things paranormal, Gary Busey!!!

Busey was leaving a Ralphs grocery store in Malibu yesterday when we asked if he's ever had an experience with the undead -- and boy, did he ever!!!!

"I had a ghost one time come out of a big plate of soup I had ... it was called a soup ghost."

It gets better -- watch the clip.