yeah, you pull/slide your gear @ or above 3000 rpms, then you push it in a higher gear @ 2500 rpms, and you wont feel a thing. Well, thats in my car atleast. (5sp 00accord coupe)

Edit: im not sure why you would want to do it if youre racing, if youre at redline, you would have to wait for your car to get all the way back to 2500 rpms. And if you didnt, youre grinding like e-40