perhaps take to outside mechanic to let them test drive with you...to find the rattling source...perhaps u can go mahihi workshop. he might be able to find the source of the rattling...hop this helps
not sure bout other ppl, but i didnt do that... or u long time nvr drive the car not used to it already? take to workshop to check already?

Hi Mahihi, recently my car vibrate when rpm hit 2.5k.