Your success drives your further actions.
Benefit: When you confirm a critical hit or roll a natural 20 on a saving throw, you gain a +2 circumstance bonus on a single attack roll, saving throw, skill check, or ability check of your choice before the end of your next turn. You must choose to use this bonus before you make the attack roll, saving throw, skill check, or ability check.
Pathfinder Roleplaying Game Advanced Race Guide © 2012, Paizo Publishing, LLC; Authors: Dennis Baker, Jesse Benner, Benjamin Bruck, Jason Bulmahn, Adam Daigle, Jim Groves, Tim Hitchcock, Hal MacLean, Jason Nelson, Stephen Radney-MacFarland, Owen K.C. Stephens, Todd Stewart, and Russ Taylor.