Silly Sally Strikes Again

One day, Silly Sally took the "kid phone" (the spare cell phone designated for kid use when said kid goes a-visiting) from the kitchen and went to visit her friend down the street. Well, the girls were having a good time, even did a little door-to-door fund-raising in the neighborhood, for a charity. Everything was just hunky-dory until the girls decided to visit a local pond to throw rocks. Sally, being only ten (she just had a birthday), did not think to secure the kid phone, which was in her coat pocket, while she was tossing her rocks. No one knows which item flew the farthest, into the pond: the rock or the phone.