Lindsey Vonn: I'm the Flipping BEST

Even the Russian judge would give Lindsey Vonn a perfect 10 for this split decision on the beach.

The skiing champ got in an acrobatic training sesh Friday in Santa Monica. She's recovering from a knee fracture suffered earlier this year, and from this angle ... everything's a-ok.

Listen carefully, you can almost hear LV's abs whispering -- "You messed up, Tiger. Big time!"