Place it at the climax of a legendary encounter edit, right after Enemy Spotted and just before Inception Horn, so the first sound signals the threat and the second gives the reveal its weight.
About this sound
This clip is Zapdos, the legendary Electric-type bird, letting out a sharp, piercing scream that cuts through everything around it. It feels sudden and dramatic, like a storm breaking overhead, and it works as a jolt of excitement for anyone who recognises the cry. The sound comes from Pokemon, where Zapdos is one of the original legendary birds.