Directions:

Spray bottom of Dutch oven with nonstick cooking spray. Place roast in pot and brown for 2 minutes on each side.

In a bowl, combine ketchup, water, lemon juice, vinegar, Worcestershire sauce, brown sugar, mustard, salt and pepper. Remove 2 cups of barbeque sauce and refrigerate. Add celery and onion to the remaining sauce and pour over roast.

Cover and cook over medium-low heat for 4 to 6 hours or until meat is tender and pulls apart easily. Remove meat from pan and shred with two forks. If desired, skim fat from pan sauce; discard fat and add sauce to the shredded pork. Just before serving, heat the refrigerated barbecue sauce. Serve shredded pork on buns with warm barbecue sauce.