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RICHMOND, VA — A seemingly endless convoy of semi-trailer trucks — with state police blocking any other vehicles from entering the highway had at least two drivers thinking they were in the “Twilight Zone.”

WTVR-TV reports that Adam Hicks and a passenger were driving on Interstate 64 in Richmond on Saturday morning. He posted a video of the unusual scene to his Facebook page saying, “We’ve seen at least 30 so far. Here’s a whole new set of trucks coming up.”

“I want to re-iterate the interstate is blocked off. No incoming traffic,” said his passenger, identified on Facebook as Joyce Ord. “This is Interstate 64, Richmond. No idea what’s going on. This is getting more and more bizarre.”

What they were actually watching was the World’s Largest Truck Convoy for Special Olympics. It is an event designed to raise awareness and money for the Special Olympics.

Several other people took to social media to report the strange sighting and ask what was going on.