 FACT: In the blast scene from inside the hospital, the shock wave  and flash of light arrive together. The only way for this to happen  is if the hospital was right next to the stadium, in which case the  hospital would be obliterated by the fireball. For everyone else,  further from the explosion, they would first be blinded/burned by  the light for seconds before the shock wave hits them as the shock  wave travels only at about the speed of sound. Also in the TV the  blast in the stadium is seen the fraction of a second before the  blast hits the hospital. Even with a direct link to the camera in  the stadium the picture of the blast couldnt arrive earlier than  the flash of the light.