Why won’t my baby sleep are being serenaded by the loudest fireworks display EVER!!

Despite the fact that a creaky floorboard 2 rooms away can be enough to wake our boys, both of them fell into a deep sleep during the Southport Musical Fireworks competition roughly a quarter of a mile from our house. The windows are actually rattling to the bangs and the garden’s illuminated by the flashes yet Fe and Lucas are sleeping… what???

Why won’t my baby sleep are almost speechless.