Answer:
How many people are dead in a standard grave yard?
Hearing something unexpected or touching a live wire can have this effect.
I am the yellow hem of the sea's blue skirt.
Hot tempered and sometimes it blows its top, making a mess of everything.
Timid or weak people are said to not have these.
I always murmur but never talk. Always run but never walk. I have a bed but never sleep, have a mouth but never speak. What am I?