[_-] Master Chief is in the [4] bathroom of the [-ai] high school where he is 礙 obstructed from leaving by a giant 疑 zombie that stands between him and the entrance. Master Chief, ever inpatient, grabs a 石 stone and hits the 疑 zombie across the face, removing the 礙 obstruction, and allowing him to leave without being 礙 obstructed. The students, also 礙 obstructed, cheer Master Chief for helping them.