I was driving the car hard....taking gears 1-3 upto 5k-6k rpm. after doing this on and off for 40 miles, hitting 80mph max....i started to hear the the engagement of the clutch making this cracking noise. I understood that the body was getting hot, but cracking in the clutch?

It was more like a squeaking noise that came when i was starting from a stop. It also came when i was aggressive with the throttle, when i came off the throttle and then pushed it down.

Also....when i parked the car....a "rotten eggs" smell was comming off of it. This smell usually came when I drove it "hard"....but even when i did drive it hard the smell never came. I dont know whether its comming from the clutch or the catalytic converter.

The car is an 05 G35 coupe 6mt with 7100miles.

I just want to know what these noises were and why this odor is still coming.

(The guys at the dealership are complete asses and would probably tell me that this is normal)