Nice little bit of equipment to - the skip rocks used with the war-sling can to a richoett attack, striking first the creature aimed for, then any creature within 5 feet the wielder designates (-2 penalty to pull it off). Normally damage is 1d3/x2. When used in the warsling, it jumps to 1d6/x4 - need to be profiecent in the warsling and the skip rock to use it thus, however. Check out Races of Faerun for the full run-down, and the War-sling Sniper, one of the few halfling prestige classes...