Once again, the most electrifying fighter in the world is set to return as 8-division world champion Manny Pacquiao has begun training for his May 7th showdown with three-division world champion "Sugar" Shane Mosley. Follow our friends at MPBoxing.com, who are on hand in Baguio City to bring exclusive behind-the-scenes video of Pacquiao as he trains for arguably the hardest-hitting puncher he's ever faced. Check out some of the footage below.