The fear of falling is usually connected with the fear of walking, jumping, running and even standing. It is also known as Basiphobia. Nobody likes falling and injuring, but people, suffering from such a condition, can't live without thinking about the possibility of falling. That's a serious and very annoying problem, which sometimes prevent individuals from performing different everyday activities.

In extreme cases of Basiphobia, the individual refuses to walk or move. S/he experiences an anxiety attack each time one is faced with idea of walking. One refuses to have physical therapy even though their body is actually ready for it.

More Info: wikipedia.en.com