Reading through the replies, you would think Tamou had knocked the innocent Galloway out, and Garbutt had run in to save the day.
The reality, Galloway throughout the game had been taking things to far on the ground, giving facials and choking players, causing pushing and shoving on a few occasions which escalated into Tamou giving him a little slap on the cheek in the last ten mins.
That's as far as it would have gone until Garbutt runs in and sucker punches, yes it was a sucker punch and breaks Tamou nose.
Anyone who thinks a sucker punch is acceptable epitomises the culture that needs to be stamped out of RL.