While skipping gears 3rd>6th, you have to wait for the rpms to lower before releasing the clutch due to there being a very large difference in the gear size with 3rd gear and 6th gear. Think of it kind of like having to rev up on a downshift, but it is opposite when youre upshifting into a higher gear. Don't expect your car to enjoy you going from 6500rpm in 3rd, to 6th gear and dumping the clutch. That will for sure destroy your clutch and maybe a bit of your gears.