ghost-knock-over

When someone from another room hears you knock over an object and thinks you did, but in reality you weren't even close to object, which fell on it's own for no apparent reason, so you blame a ghost.

Kenny: What was that noise?
Aaron: oh, I ghost-knocked-over grandma's picture thing.
Kenny: Just fell on it's own?
Aaron: Yeah, it was a ghost-knock-over
Kenny: you doth protest too much