There still wouldn’t be anywhere near that many casings. A single Glock 17 holds about 15 rounds. There are 19 casings in the picture. If we assume this is just one second, then that would mean the Glock emptied it’s magazine, magically regenerated all of its ammo, then fired even more shots into a most likely dead target. It’s mechanically impossible to fire 19 rounds out of a single semiautomatic pistol with a standard 15 round mag in one second without reloading.