There are hundreds of different kinds of phobias, but only a handful are very common. One of these phobias is the fear of heights (acrophobia). People with this fear are unable to out the window of a tall building without feeling a panic attack coming on. Another common phobia is the fear of being in confined spaces (claustrophobia). People with claustrophobia commonly feel trapped when they are in small, enclosed places like elevators, tunnels, or closets. On the other hand, people who suffer from agoraphobia fear being in large, wide-open spaces, or places when leaving would be difficult. Agoraphobia generally avoid places like shopping malls, stadiums, and other crowded places. Some people develop such intense agoraphobia that they are not able to leave their home for years.