there's a really cool one that i can do, its like a mute and tail at the same time, but i don't know if it has a name.
what you do is you is you do a mute grab realy close to your boot. then with your other hand you grab tail on the same ski.
you can tweak it, but you have to make sure that you keep your other ski in contact iwth the one your grabing, it looks sloppy if one ski is way lower then the other one.
to spin with it it looks either really cool if your smooth, or really crappy if your not. make sure to spin the opposite way of whatever hand you grab tail with (the same way as the hand you used to grab mute) If anyone can spin the other way and make it look cool that be sick i think. but i haven't been able to do it.