Train to Spain is the last deleted scene from Cars 2.
Just like in the final version, Mater made a mistake and decides to go back home, on a train he meets the handler of Team McQueen named Giulia and they were chased through the wagons by an early version of Tomber. Mater presses the emergency brake button and he and Giulia run off the train to Pamplona to with was having a Bulldozer race in the location, Mater lets the bulldozer free to stop Tomber from chasing them, as the other cars are running away from the bulldozers, Mater tries to make the bulls follow him, but to no success as they're running towards Giulia who's having trouble starting up her engine, but fortunately, Mater and Giulia get into a shop avoiding the bulldozers. The scene ends with Mater being captured by the lemons, after which Giulia is revealed to be working with Zil.
Trivia
At the beginning of the scene, Giulia's engine is malfunctioning, hinting at her true nature as an ally of the lemons
Mater says the line "I'm happier than a rollbar in a demolition derby!". This line would be later reused by Darrell Cartrip and tweaked to have him talk about McQueen instead during the Tokyo Grand Prix.