I still don't understand the appeal of Joust, I could create the same effect by just having everyone holding a full cup of beer and trying to get them to spill some.
Seeing this game seems to be the most fun when playing with people at a party, my solution would be much quicer and easier than busting out like 7 move controllers.
Spilling beer is messy, Move Controllers aren't.
You could use water then, also i don't know anyone with a move controller.
Yeah, because spilling any kind of liquid all over the place is always the better option than not spilling liquid all over the place.
Use a stick? some kids toy? there are tons of stuff you can use that are cheaper and easier to find.
But then there's no way to differentiate subtle movement from "losing" movement.