Dirty Trick
You make an unorthodox attack to briefly hinder the target. A dirty trick could be throwing sand in the target’s eyes, jamming a rock into his actuators, or any other improvised action designed to put your opponent at a disadvantage. Your target is blinded, deafened, entangled, off-target, shaken, or sickened (your choice) for 1 round, plus 1 additional round for every 5 by which the result of your attack roll exceeds the target’s KAC + 8 (see Conditions beginning on page 273 for information on these conditions). The target can remove the condition as a move action. A dirty trick is normally a melee attack, but a GM can allow certain actions to count as dirty tricks at range, in which case you take a –2 penalty to your attack roll for every 5 feet between you and the target.
Source
Core Rulebook pg. 246