REALISTIC REESE FLOORS IT!

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REESE WITHERSPOON was literally floored when a storm delayed her flight to LA from San Francisco for nearly four hours.

Grabbing a seat in the terminal and cranking up her cell phone, Reese tried to hire a limo to drive her back, said my source, but was told that some main roads had been closed.

Settling in for a long wait, the star jumped up to grab a snack, but when she came back moments later, every seat in the crowded terminal had been taken – so she ended up sitting on the floor.

“Reese didn’t make a fuss or go all movie-star diva,” said a fellow passenger. “She just plunked her butt down on the floor like the rest of us.”