If you had a dream in the form of a plane crashing into a building: Your conversations about your private life will start to increase. A plane crashing into a building in a dream indicates that undesirable events will happen, being sad, unhappy, life being turned upside down, being indecisive about some issues. To be afraid of a plane crashing into a building in your dream means witnessing bad events, being out of your mind and a difficult life.