>> whoa. looks like you scared me. >> you are really lucky. >> reporter: what just happened? >> the gas went down. come back and blow it out the holes. if i turn it up a little bit, it will burn a flame off the top. >> reporter: the gas bubbles through the well. you can't see the hose in the bottom of that. it's all gas. >> reporter: it was, at one time clear? >> crystal clear. >> reporter: it steams off like alka-seltzer. what's causing it? like a lot of people in rural pennsylvania, he has been fraked. this area is seeing boom in the natural gas business because of a geological formation known as the shale, a drilling process called hydraulic fraking.