Taking steps backwards
Hiding your face in your hands
Shifting glances all around the room
Wide eyes
Crossing your arms across yourself
Taking a defensive stance/pose
Stuttering (USE SPARINGLY PLEASE)
Scratching the back of your head
Shifting weight from side to side
Exaggerated hand motions (fanning self, vague gestures, etc.)
Nervous quirks (playing with your hair, picking at skin/clothing, etc.)
Turning head sideways to avoid staring straight ahead