Place it at the start of a scene change to signal an interruption, then follow it with the Metal Gear Alert Sound for a second alarm, and close with the Law & Order Dun Dun for a serious reveal.
About this sound
This is Hank Schrader's phone ringtone from Breaking Bad, a short, looping, old-fashioned mobile ring with a bright, tinny electronic tone that repeats in a simple pattern. It feels urgent and attention-grabbing, like a real call cutting into a tense moment, and it instantly brings Hank, the loud, confident DEA agent, to mind.