Revealing mistake: When the transvestite is throwing eggs at Samantha's window, she is holding the cardboard egg container in her left hand. She keeps throwing eggs, but you can tell by the way she is holding the egg container that it is really empty. It flops down vertically from her hand, and there is no way eggs would be able to remain in the egg crate by holding it in that manner.
Continuity mistake: During the party, when the music starts the man with white bermudas and light blue shirt behind Charlotte keeps changing positions between shots.
Continuity mistake: In the duck pond, Big's wet hairstyle changes between shots. Also Carrie's, from soaking wet and straight to slightly curled.
Continuity mistake: After Trey and Charlotte have sex, the way his jacket lies on the box changes between shots.
Continuity mistake: At Charlotte's, Sam reaches for the Martini on the fireplace and turns around. A shot later she is reaching again for the Martini and turning around again.
Continuity mistake: Carrie places a thick blue book on the right side of the fireplace, but a shot later it appears on the far left side.
Continuity mistake: While unpacking at Charlotte's place, she holds one candle in one shot, but they suddenly become two a second later.
Continuity mistake: A couple with a man in green holding a brown notebook walk behind Charlotte but disappear in the following shot. (00:03:50)
Continuity mistake: After Charlotte twirls her drink swaps hands between shots.
Continuity mistake: When breakfasting, Sam pinches a blackberry but it disappears half a second later.
Continuity mistake: Books on top of Charlotte's fireplace fall down between shots. (00:10:02)
Answer: A popular brand of sexual lubricant. See http://www.k-y.com/index.jsp.
J I Cohen