A drug gang in my neighborhood

I'm watching a movie scene that starts with a car stopping in front of a school and the three occupants sharing what seems to be a joint, then continuing on. I see it several times in a row.

The dream shifts and I realize that I'm the person in the back seat of the car in the scene I was just watching. The two not driving hand me the joint before moving on. One of them places a bag of marijuana in my pocket and I think he's going to ask me for money, but they both explain that they're in a drug gang in my neighborhood and they wanted me to be friendly, in other words, keep quiet.

The driver is almost completely turned around and not paying attention to the road. I implore him to watch the road because I've seen this movie before and it doesn't end well. As I'm trying to remember exactly what happens, we collide head on with a blue car - the impact pushes us back onto railroad tracks. A train is coming.

What happens next is not entirely clear, but a teen has a weapon which looks like a shotgun microphone - there are many people around and he wants to kill all the witnesses to the crash, or something that happened after the crash. Everybody runs, I avoid a spray of bullets.

Large angry dogs are chasing me as I run through fenced-in front yards. There are dogs from the yards which run the other way to confront the dogs chasing the crowd as they are arch enemies. Someone explains that the dogs chasing us are "from The Vatican" so the other dogs will surely want to fight them. I see a dog that can't decide whether to run towards or away from the Vatican dogs.

I make it to my apartment which is the last in a row-house. The two gangsters from earlier in the dream are hiding in the apartment next to me.

The dream shifts and now I'm watching two youths approach the gang, wanting to sell drugs for them. There are a dozen or so men sitting in a row of folding chairs, ranking from low-level to leaders from left to right. The youths talk to the ones on the left, who are the two from the car earlier. They pass the question down and it is translated through a few languages before it gets to the leaders, who are the oldest. The answer they pass back is "No, you are too young." The final translators don't translate accurately, they say the answer is that they'll think about it. The final translator also tells one of them to point a broken wine glass at the leaders and say, "You think about it!" The youth does so.

I'm back in my apartment and someone has alerted the two hiding next to me that the police are coming. They exit through my apartment, climbing out the window. They speak in a foreign language to someone warning them as they run off.

I watch a large procession of children follow them slowly. The last in line is pushing a wagon filled with a lambic-like beverage, which I figure must be some tradition of the culture.