Factual error: On Day 3, look at The Embrey Star newspaper when it zooms into the headline. Above the headline is the newspaper's web address, which is unlikely given the paper is from 1980.
Great sites
Quotes
Harmony: Well, for starters, she's been fucked more times than she's had a hot meal.
Harry: Yeah, I heard about that. It was neck-and-neck and then she skipped lunch.
Mistakes
When Harry and Perry were on a rooftop after finding out the identity of the girl in the lake, Harry was talking non-stop and Perry puts up his left hand to Harry's mouth to stop Harry talking. When the scene cuts, we see that Perry has his right hand up instead of his left. See more...
Kiss Kiss Bang Bang mistakes
Continuity: After Perry and Harry leave the lake with the girl in the trunk, the headrests are missing from the front seats, but when the shot cuts to them arriving at Harry's hotel, they reappear.
Revealing: Towards the end when Harmony calls Perry's phone as she's lying on the ground, Harry grabs the phone and looks at the caller ID to see her name. Unfortunately that's not the display showing who's calling. Anyone who has a Nokia phone will recognise that that's showing the contact list with just two entries - Harmony and a random number. The fact that it says "contacts" at the top of the screen is a bit of a giveaway.
Kiss Kiss Bang Bang quotes
Harry: What is it out here with these women?
Harmony: Oh please, Harry, they're no different from anywhere else.
Harry: Yes, they are. These are damaged goods, every one of them, from way back. I'm telling you, you take a guy who sleeps with 100 women a year, go into his childhood - dollars to doughnuts, it's relatively unspectacular. Now, you take one of these... gals, who sleeps with 100 guys a year, and I *bet* you if you look in their childhood, there's something rotten in Denver.
Harmony: Denmark.
Harry: That too! But it's abandonment, it's abuse, it's, "My uncle put his ping-ping in my papa!"... and then they all come out here! I mean, it's literally like someone took America by the East Coast and shook it, and all the normal girls managed to hang on.
Harmony: OK, everyone who hates Harry raise your hand!
[All the girls in the club raise their hands.]
Perry: See that? Obedient little bitches too.
Girl: Fuck you! [Throws a glass at Perry, which he ducks.]
Harmony: Well, for starters, she's been fucked more times than she's had a hot meal.
Harry: Yeah, I heard about that. It was neck-and-neck and then she skipped lunch.
Gay Perry: That it?
Harry: No, that's the other corpse from the last guy who stayed here.