The building that housed the former Enterprise Health Foods appeared to be well involved in fire Tuesday afternoon, and that’s what it was supposed to look like. Smoke appeared to be pouring from the green building at Hartnell Avenue and Reservoir Lane, but it was really just a high output artificial smoke generator, like the kind used for haunted houses and rock concerts. It was all for training, honing the skills of the 6 new probationary firefighters, and to prove they’re ready to save real people from real fires.