Why are heartbeats scary?

[vaiocomputer]

I know this has little to do with Ubuntu, but I want to know why a lot of times in the media when they're trying to unnerve you, they play back heartbeats. Why are heartbeats scary?

[cosine352]

when you are scared your heart beats faster.:mad::frown:

[murderslastcrow]

Because palpitations cause people to panic in real life.

[ubunterooster]

It is a psychological effect that your heartbeat tends to be able to be altered by surroundings.

[madjr]

they want you to feel what others feel

[lisati]

In the scary movie, and it's quiet, ......

[Dayofswords]

http://tvtropes.org/pmwiki/pmwiki.php/Main/HeartbeatSoundtrack