Brain freeze is practically a rite of summer. It happens when you eat ice cream or gulp something ice cold too quickly. The scientific term is sphenopalatine ganglioneuralgia, but that's a mouthful. Brain freeze is your body's way of putting on the brakes, telling you to slow down and take it easy.
Me: *eats ice creamquickly*
Also me: oh frick i think ive got sphenopalatine ganglioneuralgia
The gangline is a single line to which each dog is attached, usually in pairs, and it keeps the dogs in a tight formation ahead of the sled. This is better for forested areas or narrow trails, and is the typical harness system used in sled dog races such as the Iditarod or Yukon Quest.