Watching a horror film could burn off a whole bar of chocolate,according to a new research released today.Viewers who put themselves through 90 minutes of adrenaline-pumping terror1can use up as much as 113 calories,close to the amount burned during a half-hour walk and the Watching a horror film could burn off a whole bar of chocolate, according to a new research released today. Viewers who put themselves through 90 minutes of adrenaline-pumping terror1can use up as much as 113 calories, close to the amount burned during a half- hour walk and the