Low impact
From the AFL's 2019 Tribunal guidelines
(B) IMPACT Consideration will be given as to whether the impact is Low, Medium, High or Severe. In determining the level of impact, regard will be had to several factors. Firstly, consideration will be given to the extent of force and in particular, any injury sustained by the Player who was offended against.
Secondly, strong consideration will be given to the potential to cause injury, particularly in the following cases: » Intentional head-high strikes, such as those with a swinging clenched fist, raised forearm or elbow; » High bumps, particularly with significant head contact and/or Player momentum; » Any head-high contact with a Player who has his head over the ball, particularly when contact is made from an opponent approaching from a front-on position; »
Forceful round arm swings that make head-high contact to a Player in a marking contest, ruck contest or when tackling; » Spear tackles; and » Driving an opponent into the ground when his arms are pinned. T
he absence of injury does not preclude the classification of impact as Severe
There are 4 categories Severe , High, Medium and Low. Absolutely no way you can categorise Hawkins action as low. Ludicrous.