Social media reacts to Francis Ngannou's PFL knockout of Rennan Ferreira

Francis Ngannou returned to MMA in violent fashion at PFL: Battle of the Giants on Saturday – and social media had plenty to say about it.

At Kingdom Arena in Riyadh, Saudi Arabia, Ngannou took size out of the equation. He took down Renan Ferreira and blasted him with ground-and-pound punches for the first-round stoppage.

Check out what the MMA community had to say below.