Man Claims He Visited Another Planet - He Says: "I Brought Objects From The Planet To Prove It"

Lila wiped the leftover gel off her stomach and sat up straight. She got dressed and wanted to walk out of the room, but the doctor stopped her. “I’m sorry, Lila, but you can’t leave. We’ve called the police….” 

But why was Lila in so much pain? Why was the doctor so secretive? And why did they call the police?