17 simple 3 ball juggling tricks
If you are wanting to learn some new 3 ball juggling tricks, then try these! This is not a tutorial, it is a demonstration. Some are much harder than others, but with some perseverance you should be able to do them.

10 Advanced 3 Ball Juggling Tricks: http://www.youtube.com/watch?v=3zJC3dYOOv4

Tricks are (in order):

3 ball Cascade
Outside Throws
Columns
Fake Columns
Half Shower
Mill's Mess
Right Shower
Left Shower
Box
Mill's Mess Shower
Crosses
The Machine
Boston/Slams Shuffle
Tennis
Clawed Catches
Back of the hand catches (with just right)
Behind the Back
The video shows a young man juggling three balls in a residential setting. The danger lies in the potential for the balls to hit him in the face or head, particularly during the 'Mill's Mess' trick where the balls cross over in front of his face. He is not using any safety equipment. It is unclear if he is a professional juggler, but he appears to be skilled. He is the only person who would be affected by any mishaps. While the video does not show any negative outcomes, a potential aftermath of a missed catch could be injury to his face or eyes.