The Professor's Basement

Everyone knows about the house at the end of the street that the mysterious professor lives at but no one knows what it is he does. While you and your friends were investigating and snooping around, you wander inside to figure out what makes him so mysterious. You hear keys at the front door and as you hurry to the basement to hide, the door closes and locks you in. The professor is a mysterious man as you know, but you never knew he was hiding a secret this big. Figure it out quick before he comes back and finds you!