Sorry for the weird subject line but that's what my car sounded like when I went to start it this morning.
It cranked a little slower then usual and when I did start, the thing sounded like an RX-7 I didn't know what to do but didn't want to shut it down cold so I let it sit there and it contined to do that for about 10 seconds. eventually it smoothed out and idled normally.

Not much fun though, any ideas what could have caused it? Anyone else had this happen?

- no CEL's or other lights.

 

doesn't sound like a problem to me

 

LOL. the car seemed like it was shaking as it was doing this and got really loud.