Hagrid is one tough mofo, and will not take bullshit from nobody, and he will kick butt just by being.
Scene from Prisoner of Azkaban: ...as Draco took steps towards Buckbeak, believing he can pull off what Harry had just done, but by skipping all of the provided instructions.
With a massive stomp that rent the ground and sent clumps of earth into the air with such a force, that even Buckbeak leapt back with a cry of alarm.
"Mr. Malfoy," said Hagrid, "I don't recall telling you to step forward!"
He watched as Draco drew in a breath with a look of indignation on his face and Hagrid levelled his boomstick right at the boy's face, "I'd watch what I'd say next if I were you, motherf**ker, because if I don't like what I hear, I'ma smack you so hard, your GRANDKIDS will feel it!"