Civic EG

was driving, car made a wierd sound over and over again. then exaust made alot of white smoke, like a cloud, then the engine started smoking out of the dip stick hole, oil shot out of it. before that the cars rpms were sitting at 100 - 400rpm back and forth constantly,. no theres an oil leak and its not run able, will start. no check engine light. didnt over heat. completly random ? any ideas on what it was. honda civic si d16z6 engine. in a honda civic eg si. need help asap!

White smoke out of exhaust is burning coolant which means blown head gasket or cracked block (less likely). If the smoke has a blu-ish tint, it was burning oil which could mean rings or valve seals.
If oil was squirting out of the dipstick hole, you've got a lot of pressure escaping your combustion chamber, making its way to the bottom end of your engine - usually a sign of shot rings. Either way you might as well start by pulling the head off to see the damage.
Did you check the oil and coolant to see what it looks like?