Original sentence: " The pepper spray was released in the rear stairwell of a classroom block."I was told to go home but two or three people from my class were sent to hospital."Then a teacher came in and we were all told to go down to the school medical room.(student) " I thought it was a bit stupid having to of went back in there after, also it didnt feel the same I just felt upset about the amount of innocent people that got really ill.A Kent Air Ambulance Trust doctor and ambulance staff assessed or treated a further 35 pupils at the scene while fire crews wearing breathing apparatus ventilated the building.A Kent County Council spokeswoman said lessons resumed after the incident and the school is now open as normal.A total of 21 pupils were taken to William Harvey Hospital suffering from minor breathing difficulties, coughing, sore eyes and vomiting.Lots of people were panicking, some of my friends were coughing and some fainted.Meanwhile, two parents were arrested at the school on suspicion of assaulting police.More than 20 pupils were taken to hospital after a 12-year-old boy released pepper spray at their school.Pupil Georgina Fletcher, 11, said: "I was in a humanities lesson when we all started to smell something funny.The boy, who was arrested and held on suspicion of possessing a banned weapon and discharging a noxious substance, has been freed on bail.The injured pupils of Christ Church High School, in Ashford, Kent, were all later sent home.The men aged 32 and 37 were subdued with parva spray - a different substance from the illegal one used inside the school.We didn't know what it was and a lot of us started coughing