You are used to throwing things you have on hand.
Benefit: You do not suffer any penalties for using an improvised ranged weapon. You receive a +1 circumstance bonus on attack rolls made with thrown splash weapons.
Normal: You take a –4 penalty on attack rolls made with an improvised weapon.
Pathfinder RPG Core Rulebook. Copyright 2009, Paizo Publishing, LLC; Author: Jason Bulmahn, based on material by Jonathan Tweet, Monte Cook, and Skip Williams.