Attendance Line ⇢ The members line up side by side along a fence or wall.
NTT Line ⇢ Nose To Tail, your horse's nose is touching the horse’s tail that is in front of you. Do not be inside of the horse in front of you until trotting.
HI ⇢ When your horse is halfway inside of the horse in front of you during a trot line.
OT ⇢ Overlapping tails. Normally used with gen2 Friesians.
Brush Boots, Not Crush Boots ⇢ Be sure not to crush the leg of the rider beside you in flat moves.