An employee was operating a forklift to move a bale of yarn onto a waste scale. After aligning the yarn to the scale, the employee began to back the forklift out. The scale became caught on one of the forklift tines. The employee exited the forklift and attempted to move the yarn bale from the tine. As the bale began to shift, the employee positioned himself to provide resistance against the bale, resulting in a dislocation of the right knee.