Two million people promised on social media to show up at the gate to Area 51, the secret U.S. military installation, to find out if aliens are real.
In reality, only a few thousand showed up.
Sydney Norling is a tourist from Sweden.
(SOUNDBITE) (English) SYDNEY NORLING, TOURIST FROM SWEDEN, SAYING: "When this was trending on the internet, all of my friends in Sweden was talking about it." About 100 stayed for Alienstock - a celebration of all things out of this world.
For some, it was an opportunity to show off their Naruto run - a reference to the Japanese anime character Naruto who flings his arms behind himself.
For others, it was a chance to meet other like-minded people.
Samantha Schueler traveled from Omaha, Nebraska.
(SOUNDBITE) (English) SAMANTHA SCHUELER, TOURIST FROM OMAHA, NEBRASKA, SAYING: "I think it's going to turn into something consistently every year with the type of people that I've met here, they are pretty cool.
The fact that everyone just on a whim came here too and this many people showed up, that was kinda cool." Connie West is the co-owner of the A-LE-INN in Rachel, Nevada.
She organized Alienstock.
(SOUNDBITE) (English) CONNIE WEST, CO-OWNER OF A-LE-INN, SAYING: "Only thing I don't want to do is disappoint my community, because my community means everything to me.
As long I can walk away with this and they are ok with me, then I'm good...then I'm good!" The event started as a joke, a Facebook page titled "storm area 51, they can't stop all of us." It ended with local officials noting, that if there's a similar event next year, it needs to be better planned and funded.