Who knew Indiana Jones could be upstaged by a bunch of 20-somethings? Not us.

But that is exactly what happened at the nonprofit Conservation International’s annual fundraiser, hosted in Union Station’s East Hall on Thursday night.

Ford, who has been advocating for pilots’ rights and environmental preservation on the Hill this week, was vice chairman and presenter at the schmancy-pants dinner. The actor looked cut, a striking figure, so HOH considered writing “love” and “you” on our eyelids and to make like the swooning student in the third “Indiana Jones” film.

But a flock of 100-plus screaming whippersnappers from the group Occupy DC (the McPherson Square faction?) surrounded and picketed the pre-evening cocktail party.

The kids claimed they weren’t there to gawk at Han Solo (though we kinda bet they were), but rather to stick it to the man! Rob Walton, chairman of the boxstore to end all boxstores, Walmart, was billed to speak at the event.

The scene was epic. Tuxedoed men glared at kids in plaid, who after 20 minutes of chants against “corporate greed” began humming the “Star Wars” Darth Vader theme song. (Yes, this happened. And it was hilarious.)

Then they hummed the “Indiana Jones” theme song. (HOH may have moved with the music.)

So did the protesters ruin the night?

Probably not, but they certainly stole the thunder.

“That’s just the democratic process,” Rep. Jim Moran (D-Va.), who attended the fundraiser, told HOH.

Oh … so that’s what that was.

Correction: Oct. 21, 2011

An earlier version of this story misstated Rob Walton’s title. He is Walmart’s chairman.