no damage will be done to ur car
if u jump 1 gear ahead....

no one ask u to drive 1st gear then enter 5th gear...then ur clutch plate mah getting thinner easily lor
unless ur car is so powerful that u need 5th gear to start rolling

downshift depends on rpm ..........

i can even downshift and upshift without stepping on the clutch if u get the rpm rite......
it's possible..dun wanna debate this with u guys....