Two separate but similar incidents in Hall County schools over the past couple of weeks have emphasized the importance of knowing what to do when a person is choking. It was two or so weeks ago when Shelia Burruss, a teacher at North Hall Middle School, was eating lunch in the cafeteria. “Another student in our class ... came running over to our table and she said, ‘Ms. Burruss, Katelyn’s choking,’” she recalled.