You run through the ghost. Dave stands there, knocking his knees.
You see a lever. You pull it. A hole opens up underneath Dave. He
falls to his death.
The hole opens up even more. The ghost falls to its death. Then
another hole opens up underneath you. You fall down a chute that
twists and turns until it spits you out of the castle and into the
baseball diamond.
"Hey," you call. "Dave's dead."
They all clap and cheer. Everybody hated Dave. You were faking being
his friend.