You loose an arrow that pierces your foe, hurls him back, and knocks him off his feet.

Daily   ✦     Martial, Weapon
Standard Action      Ranged weapon

Target: One creature

Attack: Dexterity vs. AC

Hit: 3[W] + Dexterity modifier damage. In addition, you push the target a number of squares equal to your Strength modifier, and it is knocked prone.

Miss: Half damage, and you push the target 1 square and it is knocked prone.

Published in Player's Handbook, page(s) 111.