Creeper fire-back

I think it would be cool to have fire-back creepers, creeper that when a players shoots a creeper the arrow would stick to the creeper. Creepers also explode, when this happens the arrow would have a chance of getting shot back at the player (30%), or miss completely (70%). When it occurs that the arrow DOES in fact hit the player it would deal three hearts of damage due to the explosion sending the arrow speeding through the air. If the player is holding up a shield, the shield would be disabled for two seconds, when the arrow hits the ground the arrow is no longer able to be picked up. If the arrow somehow kills another mob you would get something special, kind of like how music disc can be acquired.