GWYNETH FALLS FLAT -- THEN LAUGHS IT OFF

OUCH . . . OOPS!

Gwyneth Paltrow doing SLAPSTICK?? Gwyneth's beau Luke Wilson gallantly pulled her chair out for her at a restaurant. But she didn't see him do it and when she went to sit -- she landed flat on her bottom. "Oh, my God!" gasped startled Luke as he leaped to her aid. Gawkers gawked . . . good-sport Gwyneth just laughed.