Trivia

Seems like Giles knows Buffy pretty well. He tells Angel the Buffy wouldn't think it was fair, that Angel was there without telling Buffy.
"It's not fair. You know that's what she'd say. You can see her and she can't see you."
This is, in fact, exactly what Buffy says to Angel when she sees him in the Angel episode I Will Remember You.
"What is it? You can see me, but I can't see you? What are we playing here?"

Doyle's vision, which sends Angel to Sunnydale, happens at the very end of the Angel episode, ‘‘Bachelor Party’‘ (1x07). That episode originally aired the week before ‘‘Pangs’‘, and the story continued in the next Angel episode, ‘‘I Will Remember You’‘ (1x08) which aired immediately after this episode.

This is the last time Xander and Angel share screentime together.

Xander apparently spent a very short time, presumably between last week's episode and this one, working at Hot Dog on a Stick, a hot dog joint common in malls. This is confirmed in the season finale, Restless

When Buffy and Willow are talking about Thanksgiving and Buffy says "Everything's different," she looks out the window toward where Angel is hiding right before she says it. Later Angel says the same thing to Willow referring to Buffy and him, so Buffy's comment was probably about Angel more than about Thanksgiving.

When Xander falls into the old mission ruins he lands on his right side with his left arm, covered with dirt, lying on what appears to be a palm log. The camera angle changes and the log is gone and there is a lot less dirt on Xander's arm.

In this episode it seems that the bond between Buffy and Angel is still strong because every time Angel is near Buffy she seems to sense his presence, despite his being hidden from her sight.

When Anya goes to get the brandy, she has to walk past Willow and Buffy. In that first shot, it is seen that she is reaching up for the brandy but in the next shot from a different angle, she has not yet reached up for the brandy and that her arm is still down. A second or two later, she raises her arm up to reach for the brandy on the shelf. So it looked as though she tried to grab something that was in the air.

Buffy gets cut on her upper right arm when she is fighting one of the Native Americans. There is a line of blood on her shirt that is there throughout the fight scene, but when Angel sees Buffy through the window just before he leaves, there is clearly no blood on her sleeve. (edit) When Xander is getting up after falling into the pit, you can see the boom mic moving from left to right across the screen.

Buffy: Straight up, black hat, tied to the train tracks, soon my electro-ray will destroy Metropolis bad.
"Black hats" is a term for bad guys. The train tracks comment refers to bad guys in black and white films, who would frequently tie the female lead character to the train tracks. The Metropolis comment refers to the fictional city in which Superman lives and his enemies wreak havoc.

Willow: Two seconds of conflict with an indigenous person, and I turn into General Custer.
This is a reference to General George Armstrong Custer (1839-76). He fought many winning battles against the Indians until his death at Little Bighorn, where he and every soldier under his command were killed by the Sioux Indians.

Xander: Hey, Gentle Ben, over here!
Gentle Ben is the name of a fictional book for children by author Walt Morey, which was later made into a film and TV show in the 1960s, as well as made-for-TV movie in 2002. The story concerns the friendship between the title character, a bear, and a young boy.

Riley: What's the line? 'Home's the place that, when you have to go there...
Buffy: They have to take you in.
This is a reference to a line from Robert Frost's poem "The Death of the Hired Man." The exact line is: "Home is the place where, when you have to go there, they have to take you in."

Buffy: It was more like a riot than a Ralphs.
Ralphs is a major supermarket chain in the Southern California area, it was founded by George Ralphs in 1873.

We'll hear of Xander's diseases again in Buffy. In Once More with Feeling, Anya has a line in I'll never tell that says "his penis got diseases from a Chumash tribe!"

Credits: TV.com.