Chain slip / skip and tutorial on how to fix bicycle gear change issues

This Guy Loves Guns http://goo.gl/q9BKlz
Trust Me Im A Photographer T-Shirt http://goo.gl/L5ZEWj
Jesus Loves You http://goo.gl/mwx7U7
Why An AR-15? http://goo.gl/suwWQ6
Sudo Funny Hoodie http://goo.gl/K6Kg4D