 Mr. Wilson comes back from vacation with a changed attitude, more free spirited and cheerful. However, that all changes when Dennis and Tommy camp out in the back yard because a friend of Henry and Alice have a record with wild animal sounds on it such as lions and have speakers in the patio turned up so Dennis and Tommy can pretend they are out in the jungle. Mr. Wilson hears the sounds of the animal roars and thinks that the wild animals are after the boys so he runs outside without his glasses on and carries his sword, Mrs. Wilson calls the police and soon Mr. Wilson discovers that there were not wild animals out there after all and he once again feels humiliated and back to his old self again.