Surprise is the opposite of Expectation. 
you are likely to find Refrigerator in/at/on Garage. you are likely to find Dust in/at/on Garage. you are likely to find Dust in/at/on Floor. 
Surprise <--Antonym--> Expectation 
Refrigerator --AtLocation--> Garage <--AtLocation-- Dust --AtLocation--> Floor 