EE bent over to pick up junk rock at the splitter table and was struck on the neck by a rock coming off the splitter. No damage noted at time. He finished shift on 4/26 and worked following day 4/27. He did not seek medical attention until 4/29 and did not file an injury report until 4/30. He missed work (w/doctors excuse)4/30 and then stayed off 5/1 & 5/2 by personal choice.