[Verse 1] Staring at the ceiling 3 a.m Phone face down But it still burns in my head Your name One word And the room starts to bend I swear I hear your footsteps in my chest again [Chorus] What you\'re hearing is a heartbeat It\'s now faster than a (da-da-da) (da-da-da-da-da-da-da-da) (da-da-da-da-da-da-da-da) What you\'re feeling is the hard part Every breath is like a (da-da-da) (da-da-da-da-da-da-da-da) (da-da-da-da-da-da-da-da) [Verse 2] Hands won\'t stop shaking in my coat Laughing at a joke But I\'m choking on the smoke You walk in And the air gets thin Every tiny glance It slams me from within [Chorus] What you\'re hearing is a heartbeat It\'s now faster than a (da-da-da) (da-da-da-da-da-da-da-da) (da-da-da-da-da-da-da-da) What you\'re stealing is my calm sleep Every thought becomes a (da-da-da) (da-da-da-da-da-da-da-da) (da-da-da-da-da-da-da-da)