Continuity: Wallace loses his green vest from beneath his overalls when he lands on his motorbike.
Incorrectly regarded as goofs: When Gromit climbs up the ladder during the motorbike chase, he places the base in the sidecar. When he grabs the cables, Wallace grabs the base of the ladder as it rises; after they finish the spin, Wallace places the foot of the ladder in front of him.
Revealing mistakes: For the split second you see the reverse side of the first door Gromit flies through, the circle to be cut out by his propeller is clearly visible.
Continuity: After Wallace gives Wendolene balls of wool, the balls change positions between shots.
Continuity: The porridge gun shoots at Wallace, and some of it lands on the wall. In the next shot, the porridge is gone.