Right, so, in the play, leastwise, although the book has an analogue, there's a scene where Inigo Montoya gives the man in black his sword to look at before their duel to the death, and the man in black gives it right back after he's had his look.
Even though he could have, you know, kept the sword, and that'd have made the duel a good bit easier!
And this was right after the scene where - so, remember how in The Princess Bride when the man in black is pursuing the Sicilian Crowd as they climb the Cliffs of Insanity, but the Sicilian Crowd makes it to the top before he can catch them, and they cut the rope, but the man in black makes his Reflex save to let go of the rope in time, and starts climbing without the rope, and Inigo is left behind to kill the man in black when he makes it to the top, but waiting is super tedious and - actually, let me quote it, I've got the book around here somewhere:
Forty-seven feet to go now.
Now forty-six.
"Hello there," Inigo hollered when he could wait no more.
The man in black glanced up and grunted.
"I've been watching you."
The man in black nodded.
"Slow going," Inigo said.
"Look, I don't mean to be rude," the man in black said finally, "but I'm rather busy just now, so try not to distract me."
"I'm sorry," Inigo said.
The man in black grunted again.
"I don't suppose you could speed things up," Inigo said.
"If you want to speed things up so much," the man in black said, clearly quite angry now, "you could lower a rope or a tree branch or find some other helpful thing to do."
"I could do that," Inigo agreed. "But I don't think you would accept my help, since I'm only waiting up here so that I can kill you."
"That does put a damper on our relationship," the man in black said then. "I'm afraid you'll just have to wait."
Forty-three feet left.
Forty-one.
"I could give you my word as a Spaniard," Inigo said.
"No good," the man in black replied. "I've known too many Spaniards."
"I'm going crazy up here," Inigo said.
"Anytime you want to change places, I'd be too happy to accept."
Thirty-nine feet.
And resting.
The man in black just hung in space, feet dangling, the entire weight of his body supported by the strength of his hand jammed into the crevice.
"Come along now," Inigo pleaded.
"It's been a bit of a climb," the man in black explained, "and I'm weary. I'll be fine in a quarter-hour or so."
Another quarter-hour! Inconceivable. "Look, we've got a piece of extra rope up here we didn't need when we made our original climb, I'll just drop it down to you and you grab hold and I'll pull and—"
"No good," the man in black repeated. "You might pull, but then again, you also just might let go, which, since you're in a hurry to kill me, would certainly do the job quickly."
"But you wouldn't have ever known I was going to kill you if I hadn't been the one to tell you. Doesn't that let you know I can be trusted?"
"Frankly, and I hope you won't be insulted, no."
"There's no way you'll trust me?"
"Nothing comes to mind."
Suddenly Inigo raised his right hand high—"I swear on the soul of Domingo Montoya you will reach the top alive!"
The man in black was silent for a long time. Then he looked up. "I do not know this Domingo of yours, but something in your tone says I must believe you. Throw me the rope."
Inigo quickly tied it around a rock, dropped it over. The man in black grabbed hold, hung suspended alone in space. Inigo pulled. In a moment, the man in black was beside him.
"Thank you," the man in black said, and he sank down on the rock.
Inigo sat alongside him. "We'll wait until you're ready," he said.
The man in black breathed deeply. "Again, thank you."
(Gods below, I love this book.)