Samson is a tank engine from Thomas and Friends, known in the show for his overconfident personality and for trying to prove himself despite his small size. His whistle has become a favourite among fans who collect character sounds from the series, and it circulates on soundboards where listeners can play individual engine whistles and effects. Because it is short, clear and instantly tied to a single character, creators keep returning to it for train-themed edits, reaction clips and light-hearted jokes about confidence.