Humidity and Static Electricity
They get their hair to stand up by the cunning application of hair gel.
The velocity of the wind caused my hair to stand on end.
You cover your hair in hair gel then you comb it up
shadow --------- Your hair --------- Your feet
When you rub a balloon against your hair, it creates static electricity. This transfer of electrons from the balloon to your hair causes the individual strands of your hair to become positively charged and repel each other, making them stand up.
Some hairs do stand up from fear. An example is the 'hackles' that stand the hair erect on the back of dogs and other animals when they are ready to fight. When the skin tightens during an adrenalin rush, the hair appears to stand up at the roots, but this is hardly noticeable with the soft hair of most humans.
If you have goosebumps
A Van de Graaff generator is an apparatus found in science labs that can cause your hair to stand on end. It creates static electricity with a high voltage that attracts hair strands, making them repel each other and stand up.
Hair on your arms can stand up when you experience emotions like fear or excitement due to a survival instinct called piloerection. Tiny muscles at the base of each hair follicle contract, causing the hair to stand up and create insulation or make you appear larger to potential threats.
Standing hair is caused by the tiny muscle that connects the hair to the follicle. This muscle is called the arrector pili.
The hair experiences static friction.
OMG the hair muscles that make your hair stand up is very important. Without that your head would be flat and your hair wouldn't be allined perfectly in order ...ex . 111111111 stimulating hair and 222222 none muscluar hair.....11111111 :D 1112212212121 BAD