drain and took him with it. he was above the water, still at that stage, but his legs were wedged into the pipe. >> by removing the bag, david unplugs the drain, and now the pressure of the gushing water pushes so forcefully, it sucks david's legs into the drain. >> i jumped into the water to try and help remove him from the drain. his legs were wedged into the pipe. >> firemen, the roadworkers, they all just dived in and just trying to pull him up. >> fighting the incredible force of water, the workers are able to get his head up. he's gasping for air, and then suddenly, he goes under again. >> give me the line. give me the line. >> he was wedged into the drain up to his hips and his head was about two foot under water. >> david is in grave danger. he's drowning before their very eyes.