The smell of death drifted from the woods.Simple, but creepy. Note the combination of the foreboding 'smell of death' with the gentle 'drifted from the woods.'
A long, hairy leg poked through the hole in Ida’s window screen.The mind goes immediately to 'enormous spider,' something that's definitely icky. But then we get 'poked' instead of a creepier word, and 'Ida' rather than a more normal name. You can tell this is going to be creepy and silly.