Alva Review-Courier -

CLAY CENTER, Kan. (AP) — A group of Kansas pranksters are finally coming clean right before the 50-year anniversary of a high school finding a mysterious hole through its roof.

Richard Klocke and his friends fired a small cannon full of gunpowder near Clay Center Community High School for the Fourth of July in 1968, the Kansas City Star reported .

"This thing just exploded like crazy," Klocke said. "The metal was flying. I could hear it flying in all these directions, but I could specifically hear it flying from this direction off toward the school. It was a deafening explosion."

Authorities r...