The owner of the world’s biggest pitbull has described the pain of being flattened by the gigantic 175lb beast. Marlon Grennan, 31, is the owner of protection dogs company Dark Dynasty K9s - home of the world-famous pitbull Hulk. During a training session at their New Hampshire HQ, Grennan was clattered by the giant dog, leaving him sprawled on the floor in serious pain. The huge hit is featured in the second season of Barcroft TV’s web series Dog Dynasty, which follows the exploits of Hulk. Series one was viewed over 150 million times and catapulted Hulk to global superstardom, and the loveable giant now has his own literary agent, dog food brand and merchandise line.