One of the screws from your heatshield could have come out.
Just get a work mate to have a look at it. Should help!!
Went to qwick fit and got it up on the ramps looks like its the internals of the exhaust. Might invest in one of the K tech mild steels, anyone had one what they like?
Got one, search about it My video thread is here
My car makes a really bad sound like that when the engine is cold and it holds back. Is that normal? lol
The holding back is normal, but not the sound.