This jiu-jitsu fanatic has been training in the sport for five years, and now he's finally got the perfect companion to refine his skills, in the shape of his playful rescue dog who loves helping out.
Black belt Lucas Leite uses a collar choke in 2009 Source: © John Lamonica [CC BY-SA 3.0 (http://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons ...