Reversal

What Is A Reversal?

In Literary Term: The point at which the action of the plot turns in an unexpected direction for the protagonist

In Sports Terms: A maneuver in wrestling in which a competitor being controlled by the opponent suddenly reverses the situation and gains control.

References

http://highered.mcgraw-hill.com/sites/0072405228/student_view0/poetic_glossary.html
http://www.thefreedictionary.com/reversal