Thunder flash are noise report products that produce a pyrotechnic bang/explosion with a flash of light; each type varies slightly in effect. Our thunder flash products have been reduced in power compared to military types as they are designed for training scenarios. Enola Gaye Flash Bang Grenades. These are special FX devices only. A pull-pin 5 second delay flash bang style that's safe. For sale to law enforcement, military training, and film special effects houses . These are safe alternatives to flash bangs, for training for special effects purposes.