Eye of the Storm Talent

From wow.incgamers.com

Talent: Eye of the Storm Talent
Effect: Gives you a % chance to gain the Focused Casting effect that lasts for 6 sec after being the victim of a melee or ranged critical strike. The Focused Casting effect prevents you from losing casting time on Shaman spells when taking damage.
Statistics: Rank 1 = 33%, Rank 2 = 66%, Rank 3 = 100%.