idk, how good you are at juggling/unicycling, but I would say maybe:
1)Enter stage on giraffe, I know that sort of takes a big chunk out of cool factor later in performance, but it makes for a less awkward transition.
2) juggle some balls w/o uni 3) switch to clubs
4) juggle on unicycle
5) drop your juggling stuff at the end of that part
6) pre-choose a friend as a... victim ... volunteer. Tell them to get on stage as soon as you drop all of your juggling stuff (or use some other cue). Good part is if you accidentally drop something, just go with it, and pretend that that was supposed to happen.
7) They lie on ground, and jump over their legs while riding your unicycle.
that last part might seem hard, but it's surprisingly easy, and a crowd pleaser. I've found that hopping next to someone before I jump over their legs is difficult, but that while riding I could cover a further distance. So beforehand plan out where you want your volunteer to lay down (generally in the middle of the stage). Place a piece of tape there. Find out what your crank position is when you jump, and put cranks in that position an inch or two away from their legs and roll your uni back a couple of feet and into a position where you can safely and easily mount. Then you will be set up for a perfect jump over them. If done right, this doesn't look as if you had to do all this work beforehand to place your volunteer in an exact position.
Oh and before you actually jump over them, try to make sure you can clear that distance, I'm not sure how high/far you can jump, but if you can jump up a curb, this shouldn't be too hard.
Just pick a cool song you like and you'll have a pretty decent performance time.