Cordelia bites a vampire and says, “See how you like it.” In contradiction to that, Cordy just moments later, asks Willow and Jenny what “those things are”.

When Willow and Jenny get into Cordy’s car, Cordelia’s mouth doesn’t move when she’s talking, when we see her in the shot from behind.

You can clearly hear Angel breathing heavily when he runs over to Buffy, but he then says he can’t resuscitate her as he has no breath. He also mentioned this in the previous episode Out of Mind, Out of Sight, when he saved the Scoobies from the gassed boiler room.

When Buffy drowns, she falls into the pool with her hair tied in a ponytail and her arms under her. When she is discovered by Angel and Xander, her arms are by her sides and her hair is loose.

Willow, Giles and Jenny are talking about where the Hellmouth will open. They figure the Bronze and Willow says, “The Prom!”, the only problem, the dance was the Spring Fling.

How does Xander know where Angel lives?

When Buffy walks through the sewers, you can see the shadow of what seems to be a production member on the wall.

The calendar in Giles’ office reads June, but everyone is getting ready for the May Spring Fling dance.

Where does Giles get Angel’s phone number from?

When Buffy and Xander sit down on the bench, the strap of Xander’s shoulder bag keeps moving in every shot. Sometimes it’s under his collar, sometimes it’s over the collar and in some shots the strap is not there at all.

When Xander and Buffy go to a bench to sit down, Xander says to a guy on the bench, “move”. It seems very unlike him to do this, and for Buffy not to react to his uncharacteristic bossiness. It’s also weird that the guy moves - isn’t Xander supposed to …

In the class of invisible students, how does Marcie know the chair she picks to sit in is unoccupied?

As Buffy is knocked down by Marcie, the rope around Cordy’s left hand becomes untied. For the rest of the scene, the rope is tightly tied around Cordy’s hand once again.

The Bronze has a sign saying ‘Closed for fumigation’, but the post fumigation party had been seen in the episode Angel.

How does Marcie reach down from the roof in the cupboard to grab Cordelia, and then have the strength to lift Cordelia up through the roof? There’s no visible means of support for Marcie, and nowhere she could have held on to.