Make sure you get a gun BEFORE you start this mission. Also, have a car out front waiting. Make sure it's a solid car - it's going to be taking some abuse. There's a bug here - sometimes the car is still waiting for you when you emerge from the house and sometimes it's miraculously vanished.

Nobody is home at Sweet's house. You get a call - They need a ride out pronto. He says to drive by Emmet's to get heated. Of course you already are :)

Drive straight over there. Try not to hit anything on the way - you're going to need your full car armor. Luckily for you, most of the bad guys are in the street. Run them down!

The car will probably explode after a pass or two. Go grab another car from the nearby street, and go back for more. If you're good, you can kill everyone on the street in two sets of passes without risking your own body.

Finally when they're all dead, get a four door car and run into the red spot. They run out and join you - now high-tail it back home again with them, while you're pursued. You're save when you hit home again.

Mission passed
respect +

Grand Theft Auto San Andreas Walkthrough