Well, there are several slip-ups in the movie, as someone pointed out. But, I'll put in my two cents. Notice at the beginning of the movie as the music is playing and the camera is taking us into Craig's house. BOTH chairs are on the front porch. However, it isn't until Smokey gets there, calls Craig a "stupid mf" for getting fired on his day off, and Craig gets off the weight bench that Smokey pulls the second chair up to the porch. Also, later on in the movie when Craig throws the Glock up to Smokey, who is on the roof of somebody's garage, you see Chris Tucker catch the gun that was thrown, then bend down to his right and trade THAT gun for another one that was rigged to fire the dummy rounds. It's pretty obvious if you're looking for it. If you have an eye for shoes, you'll notice that the kicks hanging from the powerline at the very very beginning of the movie are blue Converse Chuck Taylors. Smokey, when trying to stop his car, is wearing *gasp* blue Chucks. Guess we know he doesn't donate to Goodwill.

And, finally, since the movie was done on such a shoestring budget, and quite a bit of it takes place in front of Craig's house (an actual house, on location) you'll notice that ALL the windows of the house are up. Yes, it was probably hot and in the 'hood the A/C never works, but this was done on purpose, because that way...you never see the camera reflection. :-)