Place it in the lead-in just before the main impact, then follow it immediately with a Vine Boom Sound for the hit, or place a Dun Dun Dun sound after it when the reveal needs a second beat.
Über diesen Sound
This clip is a low-pitched Heavy Timp Rise timpani roll lasting 4.8 seconds, with deep, heavy drums building in weight and intensity throughout. The rolling low drums create a tense, dramatic feeling of something large approaching, building anticipation and dread before a reveal lands.