By Lucretia Munro The US version of Antiques Roadshow got off to a stellar start as fans praised a guest for her reaction to the valuation of her item. Irene Ridgway appeared on the PBS show and brought in a violin for one of the experts to analyse to see what it could be worth. The bow of the violin was valued at $4,000 while the violin itself had a value of $12,000. And it was at this point Irene exclaimed, “Shut the front door!” Explaining how she received the item, it included a story how her grandfather suffered a tragic accident. She said: “My grandfather was picking up coal with his bro…