If Andrew Schneidawind dies in a school shooting, he won’t get to finish his animated TV series, nor will he see his sister again. If Michael Pincus dies in a school shooting he will never graduate high school, get a driver’s license or finally learn how to ride a bike, and if @cathgiselle dies in a school shooting she won’t get to see her parents or her family or her dog, who will wonder where she went. That is the conversation that American high school and college students have aired over Twitter recently, with a distinctly American hashtag that has disturbed some and moved others: #IfIDieInASchoolShooting.