Thomas & Friends (1984)

S6E26 Faulty Whistles

Duncan proudly demonstrates his whistle, blowing it with such force that it soars into the air and lands in a distant field. His driver insists they cannot waste time searching for it, but they require a whistle for safety. Fortunately, a school headmaster offers an organ to serve as a makeshift whistle, which leaves Duncan in shock and dismay at the unconventional solution.