Your blood runs cold, as a reaction of that, your pores tighten, and causes your hair to move with the close up of pores by standing up.
To make someone's hair stand on end is to cause them to be very frightened, the expression is derived from getting goosebumps when scared and thus having your hair stand on end.
CHAIR stands for Cat Hair And Ice cream Rock!
b/c your dick stands up
It means when you have a bad feeling about something or someone in situatuions that are especially frightening.Your hair "stands on end" because of a primitive response to danger. An animal's fur stands on end when it is afraid - this causes the animal to "pouf up" and look larger. Even though humans do not have fur any more, our hair still has the same response when we are afraid. Thus, when you say "My hair was standing on end," you mean "I was very frightened."A slang expression. its what happens when you get a real fright 'your hair stands on end'. Also if you receive an electric shock
Apparently it stands for Good Hair Day, but the GHD company haven't confirmed this. It means Good hair doers
Your hair stands on end after you take your hat off because of static electricity in the air.
An elepant?
shadow --------- Your hair --------- Your feet
Your hair has picked up extra electrons. This causes your hair to repel against each other(Like charges repel remember!). Because you hair is so tightly packed, the furthest any hair can get from another hair is to stand straight up.
Because it stands as a heat insulator during cold days.
Circle stands for female and square stands for male.
If you are referencing to goosebumps those are actually little muscles that attach to your hair follicle that make it stand up. This process is in response to fear or coldness. In animals their hair stands up to thwart away predators. In humans, it doesn't do that but its the same muscle that pulls the follicle up.