Have you ever tried...

[Reach]

I got a pretty decent combo on mario with my tongue.

I can even last awhile on minute waltz.

Its quite easy. Its called abuse the system and mash. lol

[User6773]

I got an 8 combo on Mario with my toe, but every time i hit an arrow it was followed by a boo.

[Alkaiser88]

You could just try playing doubles with your hands on SM. (and no Nima, I don't care if you can AAAA payon doubles)