PORT-A-POTTY PREDICAMENT PETRIFIES LEO

LEONARDO DICAPRIO "looked shellshocked" when drug-sniffing dogs nailed companion PARIS HILTON for suspected pot possession at the World Cup in South Africa — but things really turned crappy when the star had to be rescued from a public john after a screaming horde of men and women mobbed him!

"Leo, hoping he'd be incognito in dark sunglasses and a baseball cap, slipped into a stall in the stadium men's room," explained a source.

"But all of a sudden, the stall began shaking and Leo freaked when he heard blaring, buzzing vuvuzela soccer horns and people shouting his name. He thought the stall was about to cave in on him, and screamed for help!"

Security guards ran to the rescue and started dragging people outside, threatening arrests. "Leo was finally able to unlock the door and escape, but he was white as a ghost, demanding to know what had happened," said the source.

"He was told that some fans saw through his 'disguise' and spotted him entering the men's room. Word spread like wildfire, and males and females alike stampeded his stall, hoping to get a glimpse of him."

After his rescue, Leo was escorted back to his seat and never left it again without a security guard.