In the flashback scene where Red is about to get knocked out by Deebo, you can see Michael Clarke Duncan, better known as John Coffey in Green Mile, kneeling next to Deebo rolling dice.
The neighborhood where the film takes place is the same street where the film's director, F. Gary Gray, grew up in South Central, Los Angeles. Principal houses that were used for filming were houses of old friends of the director. The scene where Deebo punches Red into the air is the house that F. Gary Gray grew up in.
Something odd, in the TV version at the very beginning, you see two kids - one later knocks over the trash cans - sitting on the sidewalk and you see the crackhead running by with a stereo speaker under his arm and the kids talk about how he tried to steal from their houses, none of this is on the DVD, not even in deleted scenes.
In the flashback scene when Smokey is smoking weed with Hector and his friend there is a man sitting on a chair in the background. This man is a person who said that the film makers couldn't tell him what to do on his own property. The film makers were going to compensate him by giving him a walk on roll in the film but he turned it down.