Continuity: When Clark blows out the barn doors, they go out at a fairly low angle to the ground. But when they come down next to Lois they drop down straight out of the sky.

Continuity: When Chloe and Lois return to where the barn door landed, the shadows and sunshine keep changing between shots.

Continuity: When the barn door nearly hits Lois she is just jogging alongside a clear fence. But when she and Chloe investigate it later, there's a large gate there which was nowhere to be seen beforehand.