the.com/shaking
Your body misfiring on purpose to burn off the fear it can't outrun.
means The act of trembling or moving back and forth in quick, involuntary motions — from cold, fear, illness, or emotion.
from From Old English 'sceacan,' meaning to move quickly to and fro, to brandish or flee. It has Germanic cousins (Old Norse 'skaka') and once meant 'to depart in haste' as much as 'to tremble' — which is why we still 'shake a leg' to hurry and 'shake off' what chases us. The fear and the fleeing were tangled in the word from the start.
shivering mathMuscle shivers generate up to five times resting heat
animal resetWild prey literally shake off trauma after escaping predators
caffeine jittersCoffee tremors come from overexcited motor neurons firing early
essential tremorMore common than Parkinson's, often runs in families
cold trickNewborns can't shiver, so they burn special brown fat