Cradle to Outside Elbow Stall
From ContactJuggling.org
http://contactjuggling.org/moves/157.gif
This is a great trick with many many possibilites for expansion, eg 3 ball escape, do a chest roll and then revserse the ball into this stall etc etc etc. Start by learning the stall and by working working on lots of armrolls (see ferrets animation for arm rolls)