07/09/2026
At about 35 seconds in, you can see an impala practicing a TRE response tremor in this video. - (He isn't harmed).
The impala has gone into a state of freeze or 'playing dead' as his nervous system tips over from fight/flight as he runs from the leopard in a clever mechanism that helps save his life.
The leopard becomes distracted by a hyena and runs off. The impala is still frozen for a short time. He then begins to tremor, shaking off the excess cortisol and adrenaline from his system, before getting up and walking off and continuing with his day.
This video shows how tremoring is a very natural or in fact vital process for all mammals that we can use to help us recover from an excess of stress in our nervous systems.
Impala Escapes Death from predator. You can see how it de-regulates...