Shake routine

ShakeRoutine.cs

public Vector3 shakePower = new Vector3(0.03f, 0.03f, 0.03f);
public float shakeDuration = 1f;

private IEnumerator ShakeRoutine()
{
    for (var t = 0f; t < shakeDuration; t += Time.unscaledDeltaTime)
    {
        var offset = transform.rotation * Vector3.Scale(Random.onUnitSphere, shakePower);

        transform.position += offset;
        yield return null;
        transform.position -= offset;
    }
}