Place it just before the monster appears on screen, then follow it with a Bass Drop Sound Effect as the creature fully enters the shot, and keep the sequence short so the reveal stays the focus of the edit.
关于此声音
This four-second clip is Titanosaurus's roar, a low, throaty bellow from the sea-dwelling kaiju that swells and drops like a huge creature breaking the surface. It feels tense and awe-filled, as if something far larger than the frame is closing in. Titanosaurus comes from Toho's Godzilla series, first appearing in Terror of Mechagodzilla in 1975.