It's the arrogant and cocky steam engine, Smudger, from Thomas and Friends.

Duke: Smudger..... Was a show off.... He rode roughly and often came off the rails... I warned him to be careful, but he took no notice... "Listen Dukey," he snarled, "Who worries about a few spills?" "We do here," I said... But Smudger just laughed... Until one day the manager came and said he'd make him useful at last. Smudger wasn't laughing then...

Stewart (Peter Sam) and Falcon (Sir Handel): W-w-w-w-w-why? What did he do?

Duke: They turned him into a generator.... He's still out there behind our shed.... He'll never move again....