Pit Pony 1999 S02E12 (Requested)

Episode: That Special Spark. When Stringy Borso gets a chance to leave Glace Bay to join a baseball camp down in Massachusetts, Nellie decides that her choir will give its first public performance to send him off in style - in which Angus is made the lead soloist. Unfortunately, Angus discovers he has stage fright. Meanwhile, Ned decides to install new electric lights for the mine despite objections from Cap, Jeremiah, and the other workers over the safety concerns when the pit ponies come down sick with a strange ailment. But eventually, Ned proves how useful the mine's new lights are when they show what is really ailing the ponies.