I was once i another lifetime a juggler.
Were you?! Did you get involved in the manipulation of objects for recreation?
I just juggled for extra change and did a bit in a circus. When did juggling come about?
I see, it originates as far back as the 11th century! Long time!
Who were the first to perform juggling? Was there a circus back then?
The first jugglers used more dramatic objects such as knives, fire torches or chainsaws. Circuses came a bit later.
Did they perform in front of nobility like a jester? 
Yes!  Philip Astley is credited with being the 'father' of the modern circus when he opened the first circus in 1768 in England but I dont think he was a jester!
Whats the most extreme thing that anyone has juggled?
 A skilled equestrian once juggled cars!