Granny Weatherwax can Borrow and control a beehive. It's quite a strain, but it was supposed to be impossible.
Lancre as a whole gets one when it shoots down Diamanda's claims to be a better witch than Granny: She'd challenged Granny to a staring contest. Against the sun. Midway through, one of Nanny Ogg's grandkids runs into the magic circle and falls down with a scream as the magical discharge zaps him, and Granny breaks off to check on him. The young witches say that Diamanda clearly won, because Granny looked away. Nanny Ogg and the rest of the town set them straight:
Nanny Ogg: This is not a contest about power, you stupid girls, it is a contest about witchcraft. Do you even begin to know what being a witch IS? (turns to the onlooker): Is a witch someone who would look round when she heard a child scream? The Entire Town: YES!
Important to note that Magrat was convinced she was channelling the spirit of Queen Ynci... but it was all her.
And her taking down the Queen as the Queen is hitting her with a massive mental attack.
She was nothing. She was insignificant. She was so worthless and unimportant that even something completely worthless and exhaustively unimportant would consider her beneath contempt. In laying hands upon the Queen she truly deserved an eternity of pain. She had no control of her body. She did not deserve any. She did not deserve a thing.
The disdain sleeted over her, tearing the planetary body of Magrat Garlick to pieces.
She'd never be any good. She'd never be beautiful, or intelligent, or strong. She'd never be anything at all.
Self-confidence? Confidence in what? The eyes of the Queen were all she could see. All she wanted to do was lose herself in them...
And the ablation of Magrat Garlick roared on, tearing at the strata of her soul... exposing the core.
And that wasn't the most powerful creature he killed in the series.
Only one queen in a hive!
Lady Jane - KILL!
Hodgesaargh, as Lady Jane proceeds to savage the elf that tried to get her to kill him: Sorry, she does that to me too. She's really very intelligent.
The Librarian's approach to a cruel practical joke is quite mature.
The Librarian gets a few in this book, although usually because he's A. incredibly strong and B. immune to the elves' mind-control arrows. Once again, we see that the snares set to bind the spirits and entice the minds of Man are left looking pretty foolish when they attempt to bind the spirit and entice the mind of Ape.
Magrat. Especially the cut to her right after Granny mentions how she'd love the elves.
Ridcully gets one when the carriage he and the other members of the UU staff accompanying him gets pulled over by bandits:
(Ridcully points his staff at the bandit leader)
Bandit Leader: Nice try, but Wizards can't use their magic on civilians unless it's a life or death situ...
(Ridcully fires a burst of light from his staff and turns the bandit into a pumpkin)
Ridcully: It's more of a guideline, really.
He then procedes to intimidate the rest of the bandits into giving the wizards all of the gold on their person and four horses while the coach driver sits there dumbfounded.
Granny saving Diamanda from her own stupid mistake and bodily hauling her back to Lancre while being shot at by elves.
Magrat taking down the elf queen is pretty cool. What's even cooler is the sentence that gets her to do it — the sentence that Granny puts telepathically in her head. "You want to be queen?"
And then, later on, the narration describes her that way for the very first time:
The cook began to argue, then stopped. Magrat was looking at her down the shaft of a crossbow.
"'Go ahead,' said the Queen of Lancre. 'Bake my quiche.'"
"Do you want to find out how much power I have, madam? Here, on the grass of Lancre? My own turf?"
Shawn Ogg gets a quiet one; when Magrat's holed up in the armory, the elves tell him to persuade her to come out. They've already broken his arm quite badly, and he knows they're going to do a lot worse to him before they get bored. But Shawn basically tells Magrat that the elves can't get into the armory because of all the iron. "So I shouldn't listen to them if I was you."
After several books and comments on how Magrat spends too much time gathering herbs and magic objects when anything works just fine with Headology, she makes a comeback. When Diamanda gets elf-shot, she's beyond Granny's help. Granny immediately goes to Magrat for help, because Granny knows that Magrat is an expert with herbs.
The reason why Granny was a better witch was because she knew that it didn't matter which herbs she used, or even if they were just grass.
The reason why Magrat was a better doctor was because she thought they did.