This is their second movie.
Released in 1993, Nick Park has said that this is his favorite of the shorts, and is quite popular with the fans.
In 1994 it won an Academy Award for "Best Short Film, Animated"; As well as a BAFTA Film Award and several awards from film festivals worldwide.
It's Gromit's birthday and Wallace gives him a pair of "Techno Trousers" to take him for walks... This all leads to a quickly unfolding plot, including a penguin houseguest, a diamond, a great train chase scene, and of course, the trousers going wrong!