LOW

Low altitude, micro head pushes
Only head is involved

MEDIUM

Medium altitude head pushes
Neck leans forward

HIGH

Very vertical head pushes
Body pushes forward

LOW

Slow, mild head shakes

MEDIUM

Fast, confident head shakes

HIGH

Strong, drilling head shakes

LOW

Mild shrug, often one shoulder only

MEDIUM

Clear shrug, often with both shoulders

HIGH

Big shrug, both shoulders + "give up" arms

Long pauses, "ums", "like", etc

Moderate pausing, a few "ums", etc

Few pauses, very few hiccups

LOW

Projecting out only with the forearm

MEDIUM

Projects outward partially, with verticality

HIGH

Projects outward fully, with force and impact