A strange chill
Every time David entered the kitchen of his modest cottage, a weird chill would spread beneath his feet. His toes always felt chilly and clammy on the kitchen floor as opposed to the warm and cozy floors of the other rooms. But he was unable to determine why.
A creaking noise
He had believed for years that it was merely a peculiarity of the ancient house, but it continued to disturb him. David once heard a tiny creaking sound coming from the ground as he was washing his dishes. He put down what he was doing to listen and try to determine where the sound was coming from.