Thumper is a quarry machine that works at the Sodor Construction Company.
However, Salty was coming down the line with cargo cars, but there wasn't a "STOP" sign right next to The Sodor Construction Site, and Salty went under it, but Oliver warned Salty about it.
So Salty moves out of the way, and Thumper is working on the wrong rock, and Boulder falls onto the ground below, Thumper, however, is sad, but he does work hard, and tries to make Sir Topham Hatt proud.
- Thumper has made many cameos.
- Thumper is also seen in Keekre24's Wooden Railway Collection videos.
Season 1: Thumper Saves the Day
Season 8: Frank and the Fib (cameo)
Season 14:Specials: Oliver's Eleven (original storyline only)