Was he upset that day? Maybe he likes you and is ashamed by his appearance and doesn't want you to see his face. Or maybe he just had a bad pimple that day!
Look at its ears and head, if the head is down and ears is down then its probably scared. If its making eye contact then it could be angry.
If you mean martingale, it helps teach a young horse to rein and keeps their head down so it is safer to train them, a lot like a tie down.
A nail. A nail always walks on its head when it is driven into a surface.
Your eardrum.
It keeps your head on
When the butt end of the hammer shaft hits the hammer head keeps heading for the center of the Earth. It tightens on the hammers' tapered arm.
A nail. It "walks" on its head when driven into a surface, and it "speaks" with a sound when struck.
The F.I.F.A keeps the world cup in its head office at Geneva Switzerland.
never ever let a child lay down after they hit their head, keep the child upright and awake then see a physician.
If he keeps looking at your lips or if he keeps licking your lips. If you guys and and he keeps his head in a little longer he wants to make out.
To commemorate their victory. Each player cuts a single strand and the head coach cuts the last strand and keeps the net.
If you mean what protects it in the wild then it's the spikes around the head, neck and down their sides. These spikes get hard and sharp when they feel threatened or scared.