Features That Would Go In A Startled House, like a Haunted House But Not As Bad

The users of AskReddit were met with a challenge to name things that would go in a startled house, which takes the concept of a haunted house but tones it down to just startling people rather then truly freaking them out. It's reminiscent of the punishments people thought up for the residents of Heck, which would be like Hell but not as bad.