Three men are under criminal investigation for toppling a rock formation at Goblin Valley State Park in Utah, according to the Utah State Parks director Fred Hayes.

Dave Hall, Dylan Taylor and Glenn Taylor videotaped themselves doing the deed, smiling as they showed off their strength and explaining how they were potentially making the park safer by toppling over a boulder that could have landed on a child.

Hayes, however, said that the sandstone formations have stood there since the Jurassic era, some 165 million years. The parks department is investigating whether the men will face charges.

Taylor told the Salt Lake Tribune that the three men had noticed the boulder was loose and could injure someone, and he believed he was doing a "civic deed" by removing the dangerous rock.