ok i was driving normal and was about 4000 rpms and all of a sudden it sound like straight headers. it got super loud. so it worried me very bad. i was lucky and was by my friends auto mechanic shop and stoped there. i then turned the car off....... big mistake. i went to go start it back and leave cuz he wasn't there. it didnt start. the starter seams to turn over but sounds like a muffled machine gun. then it tries to grab the flywheel. when it did, it sounds like the battery was dead... now it wont even crank the starter. now nothing happens. im super lost and need help. any help greatly appreciated. thanks

p.s i got the oil changed 20 mins previous to this happening. the motor does turn
over.

 

Any tell-take oil puddles under the engine?? Any oil in the crankcase??
Until you tell us otherwise, it could be anything; and any answers at this point are guesses.
I'm going to assume it's an Oil Change that's gone terribly wrong. Hopefully, you weren't victimized by a bad Oil Filter Base Gasket. If that failed, you lost your oil, and thus your oil pressure within about a minute. Hopefully the Engine didn't try to imitate a Grenade
I was originally going to mention blowing a Spark Plug from the Head, or the Front Exhaust Pipe failing; but that doesn't answer why the starter issues. Engine internal problems do.

P

 

hmmm.i dont know. one of the guys from cb7tuner mensioned the same thing about the spark plug and down pipe. ill have to check it out. hopefully the oil theory is not the issue. thanks again