There are three basic areas of concern to various groups. The first set of concerns surround relatively common rodeo practices, such as the use of bucking straps, also known as flank straps, the use of metal or electric cattle prods, and tail-twisting. The second set of concerns surround non-traditional rodeo events that operate outside the rules of sanctioning organizations. These are usually amateur events such as mutton busting, calf dressing, wild cow milking, calf riding, chuck wagon races, and other events designed primarily for publicity, half-time entertainment or crowd participation. Finally, some groups consider some or all rodeo events themselves to be cruel.