On 9/28/2021 pumper pulled a piece of 6-inch poly pipe out of the mud, felt something in right shoulder region crunch/pop. Pumper stated no pain was felt, decided not to report anything to supervisor. On 9/30/2021 the pumper experienced pain in the shoulder region and decided to report the incident to supervisor. Pumper began receiving chiropractic care on 10/01/2021.