I have this neighbor two doors away and he is very old and disabled and i have my plumbing company going over there tomorrow to take a look at his hot water heater because what's happening with him is he had this plumber that lite the gas hot water heater and the flame keeps going out and I am kind of worried that this might be dangerous so I sent my plumbing people over there with a special request and they will be over there tomorrow morning to check this out.. Now i am wondering what might this be in regard to a gas hot water heater that is about 10 years old and could this be dangerous for the "old fellow" who cannot see or breathe very well. It is shut off now...Just curious in case it ever happens to me..( This is my once a month good deed act and in secret I told my plumbing company that I would pick up the bill) because he is poor and they will just bill me and i will bill him about 10 dollars--lol but do not tell him....But they will check it out and I am just wondering what it might be?...hoping for the lesser amount--lol clancey