英语脑筋急转弯 | The Death of Romeo and Juliet

Riddle:

Romeo and Juliet are found dead on the floor in a bedroom. When they were discovered, there were pieces of glass and some water on the floor. The only furniture in the room is a shelf and a bed. The house is in a remote location, away from everything except for the nearby railroad track. What caused the death of Romeo and Juliet?

Answer:

Romeo and Juliet are fish. The rumble of the train knocked the tank off the shelf, it broke and Romeo and Juliet did not survive.