“What about little microphones?  What if everyone swallowed them, and they played the sounds of our hearts through little speakers, which could be in the pouches of our overalls?  When you skateboarded down the streets at night you could hear everybody’s heartbeat, and they could hear yours, sort of like sonar.  One weird thing is, I wonder if everyone’s hearts would start to beat at the same time.”

-Extremely Loud and Incredibly Close by Jonathan Safran Foer