I don't know if anyone has mentioned this yet, but it confused the high hell out of me. In this video, Sonic is fighting DK. About three seconds in, Sonic uses his B Up move, creating a spring. The thing is, midway through using this move, he uses an entirely different attack, kicking DK in the face.
So what does this mean? Is it simply a matter of Sonic's B Up having a second part where you can launch downwards at a button press (since there is also footage of him springing without this attack), or is he actually breaking an old Smash Bros law and actually using a completely different move after using his B Up?