Hey guys looking for some help here. The other day I stupidly by complete accident got my new Fiat 500 lounge stuck between rocks in a bay car park and apart from a dent I am now hearing this funny rattling sound from the exhaust when I start the car I don't know if I am being parnoid and maybe it's always sounded like that?? I took the car to a garage straight after and the mechanic said there was no damage to the exhaust but today when I was driving out the drive my mum passed comment on the weird sound. Any advice?

Could be anything first guess would be heat shields next baffles in the box, shattered cat matrix? stick it on ramps slide underneath and get a friend to blip throttle.