Catch Off-Guard (Combat)

Foes are surprised by your skilled use of unorthodox and improvised weapons.

Source: Pathfinder d20pfsrd.com

• Benefit: You do not suffer any penalties for using an improvised melee weapon. Unarmed opponents are flat-footed against any attacks you make with an improvised melee weapon.
• Normal: You take a -4 penalty on attack rolls made with an improvised weapon.