Our equines love to roll, their backs wiggling hard against the ground. It is a ritualistic art form: Nose down, circle, buckle knees, drop, twist on back, sweep dirt-angel arc with side of head, grunt, fold long legs and flinty hooves into a belly tuck, rest on shoulder sphinx-like.
Intermission: Snort, sigh, shake head, look around, ponder another roll.
Completion: Unfold and extend one front leg, rub nose against knee, unfold other long leg, rise tent-like in awkward giraffe style. Full body shake.
Rolling, galloping, grazing — the equine brain and spinal column are horizontal in relation to Earth.