This morning I go to start my car and it made a weird noise and everything blacked out. You know the noise you hear when your car is on and you start it without know it was already on? Except my car wasn't on. I sat there for a few seconds like WTF? Then I tried again and it worked. Anyone experience anything like this?

I think I need to change my O2 sensor soon as well. My car act as though it wants to backfire. When driving slow like coming out of a parking space or making a right turn at a traffic light. It feels like it's coughting as if I have dirty fuel injectors which I had cleaned 5000 miles ago.