Spend their money, give a piece to bite on your sandwich or in your apple, wasting your material, don't return your things.
Talk to them and rushed, jumping straight to conclusions. If you're in the house of one them, change the position of objects when they aren't looking.
If possible, break statuettes, Bibel or other decoration objects of the house and then ask them - "This was not even very important, isn't it?".
Soaking was perfume type "dresser-of-widow", before riding a car with them.