This picture depicts two acrobatics.  The man has his legs hooked to a swing and is holding a woman who is free to fall at any given time if the man decides to let go.  Of course, these two acrobatics are probably very experienced with what they do, and are confident on completing their routine.  Both are probably feeling the thrill of being suspended many feet above the ground, and are expecting to finish off their routine as usual with no accidents of any kind.
