Do you frequently have common dreams about certain themes, and wonder if the dream symbols mean something? Here are 7 common dream meanings you must know about. Have you ever dreamed about being lost or trapped? How about missed opportunities, or car troubles? Some other common dreams include failing a test, being chased, teeth decay, and falling or sinking. Although there is no scientific evidence to prove that dreams hold special meaning, dreams have been studied to promote better self-awareness and to help us understand what's bothering us in our everyday lives.