HAZARD LEFT
Extend your left arm at a 45 degree angle and point towards the hazard.
SLOW DOWN
Extend your left arm at a 45 degree angle and move your hand up and down.
STOP
Extend your left arm at a 45 degree angle with the palm of your hand facing rearward.
SINGLE FILE
Position your left hand over your helmet with your fingers extended upward. This indicates the leader wants the group in a single file formation. Usually this is done for safety reasons.
TIGHTEN UP
Raise your left arm and repeatedly move up and down in a pulling motion. This indicates the leader wants the group to close ranks.
TICKED OFF
Extend your left arm straight out with your elbow bent 90 degrees. Carefully extend your middle finger to clearly demonstrate your dissatisfaction with the other guy. NOTE: It is not recommended you do this when you are alone.