After catching the disc, and landing in-bounds, the thrower must reduce speed as quickly as possible, without changing direction, until they have established a pivot point.
The thrower may release the disc while reducing speed as long as they maintain contact with the playing field throughout the throwing motion.
An offensive player catches the disc while running and passes the disc while still in the process of slowing down.
This is allowed, provided that the player was attempting to slow down as quickly as possible and they maintain contact with the playing field throughout the throwing motion.
Once the thrower has released the disc they do not need to come to a stop.