Abstract: In constraining the statistical physical models of escape panic，video recording of real-life emergency evacuation plays a unique role due to its rareness and real-life feature. We analyzed the video recording of classroom evacuation during the April 20，2013，Lushan， Sichuan，China，MS7.0 earthquake broadcasted by CCTV News，and discussed the implication for constraining the statistical physical models of crowd evacuation. Comparing to the records of the May 12，2008，Wenchuan，MS8.0 earthquake，we argue that trained and untrained crowd may have different behavior during the panic evacuation，which has to be taken into account in the modeling.