Bishop of Hereford: But brother friar, you would strike another man of the cloth?
Friar Tuck:No, I wouldn't. In fact, I'll help you pack for your journey! You have to take a lot of gold to help you on your way. (shoves more bags of gold into the Bishop's arms) You are a very rich man! And that, and that. (finally throws him a small bag) And here... here's thirty pieces of silver to pay the Devil, on your way to Hell!
He also cheerfully refuses to surrender when first ambushed by Robin and his men, and gives a good account of himself in the fight that follows; sincerely apologizes to the "heathen" Azeem for misjudging him, after the Moor's knowledge of medicine saves a difficult childbirth; and proclaims to a rapt audience that the true blessing of wheat is not bread, "which any fool can eat", but beer.
When several refugee farmers make their way to the outlaws' camp, they blame Robin for all their assorted misfortunes - they've lost land and possessions; their children have been injured in the scuffling with the Sheriff's men. He promises that they will forge a new life for themselves, and reclaim what they've lost in an epic Dare to Be Badass speech.
Man: But what about our kin? The Sheriff's taken all they've got, too!
YMMV on this one, but the final showdown between Nottingham and Robin, where the Sheriff proceeds to completely dominate the majority of the fight, and only loses due to a stroke of luck.
In the days before Internet spoilers, the audience reaction when Sean Connery popped up as King Richard at the very end of the film was fantastic.
And a Real Life example for Connery himself - as noted on the Trivia page, he was paid $1 million for that uncredited role, and he donated it all to charity. Not bad for five minutes' work!
Little John's wife Fanny, remaining completely casual in tone while being questioned by a guard... to the point of remaining utterly calm and almost dismissive as her husband comes up behind the guy and dispatches him. "Hello, my lover..." Especially impressive considering she has to hold it together if there's a chance of saving her son's life.