1
In 4- to 6-quart slow cooker, place pork.
2
In small bowl, combine vinegar, brown sugar, salt, red pepper flakes and black pepper; mix well. Pour over pork. Cover; cook on LOW setting 10 to 12 hours or HIGH setting 5 to 6 hours.
3
Transfer pork to cutting board, reserving juices. When cool enough to handle, cut and pull pork into bite-size pieces.
4
In bowl, combine pork and as much of juices as desired to moisten. Return to slow cooker until ready to serve. Serve over toast or in rolls, if desired.