Books On Juggling Jugglers keep a number of objects in the air at the same time. Some even ride a unicycle as they juggle their knifes, balls, or clubs. It's amazing with this amazing level of concentration most jugglers have trouble keeping a real job. But then your can only juggle your bosses office supplies so often before it stops being cute. Actually, not always.
Mimes probably have the worst reputation in the entertainment field.
I once kidnapped a mime just to see if he would yell for help. Odd thing was, with 200 witnesses, nobody else yelled for help either. It was really easy to keep the guy locked up to. I just put him in an imaginary shrinking box. Well, some people become a clown professionally.