Video clips of students riding the merry-go-round are given below.
Inertial point of view: In these clips, note that the ball travels in a vertical plane.
mgr98-09r.avi (450 kb) mgr98-17r.avi (400 kb)
Non-inertial point of view (one of the riders is filming):
mgr98-13r.avi (250 kb) -- Even though the ball is thrown directly at the cameraman, the ball misses, veering off in the direction of the mgr's rotation
mgr98-14r.avi (250 kb) -- The thrower corrects by throwing opposite the direction of the mgr's rotation and hits the cameraman. Note that the ball leaves the field of view completely and then reappears.
For more clips on the Physics MGR, go here.