Harry has no idea what Hermione is planning, but he goes along with it.
Hermione heads to the Forbidden Forest with Harry, Professor Umbridge's wand pointed at both of their backs.
Hermione keeps leading them deeper and deeper into the forest.
At first, Harry thinks that Hermione is leading Professor Umbridge to Grawp, but they're going the wrong way.
Suddenly, a voice rings out, "Who are you?" (33.26).
It's Magorian, along with a number of other centaurs.
Professor Umbridge shouts, "be very careful! By the laws laid down by the Department for the Regulation and Control of Magical Creatures, any attack by half-breeds such as yourselves on a human —" (33.31).
Bane takes offense at the description "half-breed," while Magorian is enraged that Professor Umbridge thinks centaurs have "near-human intelligence" (33.34).
They charge Professor Umbridge, who keeps shrieking and trying to stun them.
Bane carries Professor Umbridge away.
The other centaurs debate about what they should do with Harry and Hermione.
One of them, Ronan, protests that, "We do not attack foals" (33.48).
Another centaur thinks Harry's pretty darn close to being an adult, and anyway, they're trespassing in the forest.
Before the centaurs can attack Harry and Hermione, "there came a crashing noise on the edge of the clearing so loud that all of them, Harry, Hermione, and the fifty or so centaurs filling the clearing, looked around" (33.62).
He's shouting for "HAGGER!" (33.69).
He misses Hagrid and wants "Hermy" (33.74) to tell him where Hagrid has gone.
The centaurs begin to shoot at Grawp with their arrows, injuring him and making him bleed.
Grawp grabs at the centaurs and throws them around.
Harry and Hermione run away.
Harry feels his scar throbbing and worries that Sirius is getting closer to death.
But how are they supposed to get to the Ministry of Magic now that they don't even have their wands?
Out of the trees suddenly appear Ron, Ginny, Luna, and Neville.
They managed to escape the Inquisitorial Squad, spotted Hermione and Harry going into the forest, and followed them.
Now, they all want to know what to do next.
Ginny, Luna, and Neville insist on accompanying Harry to the Department of Mysteries even though he thinks it isn't safe.
It's Luna who has an idea of how to get there: they should just ride the Thestrals.
They are attracted to the smell of blood, and both Hermione and Harry are covered in Grawp's blood.
Eventually, six Thestrals land in front of the group.
Harry tells them, "All right [...] pick one and get on, then" (33.139).