Ricochet is an esper-2. He can make himself see ricochets as spots overlayed over his normal vision while holding a throwable object. If he then throws the object at one of these spots the object will ricochet exactly as he has foreseen. He can deliver the object with pinpoint accuracy even if it involves several ricochets in a row. As Prof. Quintain points out, there is clearly a telekinetic or other talent involved to allow for the accuracy of flight.