Basically, if you reach behind you into the back seat with a torn shoulder, (Labrum) to grab your child's sippy cup, bam out of socket it comes. After much screaming and yelling, some poor fool comes up and puts one hand on the front of your shoulder and one hand on the back and pushes the front of your shoulder really hard to put it back in the socket. Yelling stops and you quit reaching behind you for fear it will come out of the socket. You take an old wet suit and cut it up into a crude harness, stich it around the arm and Velcro that thing in place with the Velcro from your grandpas New Balance shoes. Good as new psychologically and it feels like you might be able to reach above your head a little and tip a can of brew until you have 20,000 to have a surgeon fix the tear and make it hurt like heck for about 16 weeks.