1. In climbing, to free solo is to climb with no protection to catch a fall. The climber relies only on his or her ability.

2. In highlining, to free solo is to walk a highline without a leash or harness to prevent a fall. The highliner relies only on his or her balance and ability to catch the line to keep from falling.

Alain climbed 100 towers in 2011.😃😃😱