Tiger Woods still knows how to party.

Or not.

On his first big public date with Lindsey Vonn at Monday's big Met Gala in New York City, Woods seemingly got falling-down loaded.

No, really. He fell down.

According to Us Weekly, after walking the red carpet amid a sea of celebrities for the annual Costume Institute Gala at the Metropolitan Museum of Art, the couple went to the star-studded after party at the Boom Boom Room, held at the top of the Standard Hotel.

The blond skier reportedly steered Woods through a crowd that included Leonardo DiCaprio, Anne Hathaway, Amanda Seyfried, Chris Brown, Solange Knowles and Kate Upton, among others.

"Tiger looked uncomfortable," an onlooker said. At their table they chatted, drank, held hands and kissed for much the night. At one point, Woods got up to dance awkwardly, according to US Weekly, bopping from side to side and grabbing Vonn's rear end affectionately.

Then the fun started.

Around 2 a.m., a seemingly tipsy Woods fell while walking up a small flight of stairs. He reportedly didn't move until Vonn, clenching her teeth and looking embarrassed, helped him up and guided him -- swaying -- to the exit.

"Lindsey and I have been friends for some time, but over the last few months we have become very close and are now dating," Woods wrote when he and Vonn announced their relationship on Facebook in March.

Contact Tony Hicks at Facebook.com/BayAreaNewsGroup.TonyHicks or Twitter.com/insertfoot.