This is a detailed Taekwondo Kickboxing tutorial for the “SideKick”, effective in Kickboxing, MMA & Olympic style competition. FAQs: Q: Where can I buy one of those kicking dummies? A: You can by a Body Opponent Bag (BOB) by going here: www.centurymartialarts.com Q: What is in the base of the BOB/Bag? A: It is filled with around 270lbs of all-purpose sand.