In many episodes the street in front of the Krusty Krab changes directions in between scenes. It can pretty obvious at times. Examples:

In Plankton, when Mr. Krabs puts Plankton on a plate and throws him out the Krusty Krab door, you see him fly directly across the road and into the Chum Bucket. This would mean the road is verical to the Krusty Krab. In the next shot you see SpongeBob and Mr. Krabs in front of the Krusty Krab and the road is horizontal to the Krusty Krab!

In the Midnight Shift, when SpongeBob goes to take out the trash the street is vertical to the Krusty Krab, and when SpongeBob finds out Squidwards story was a joke, you see outside of the Krusty Krab and the road is still vertical to the Krusty Krab. Towards the end of the episode, though, when the bus pulls up to the front door, the road is horizontal!

In SB-129, when Squidward runs inside the Krusty Krab, the street is horizontal. After Squidward hides inside the freezer, you see SpongeBob and Patrick looking through the front window. In you look beside them there is no street at all.

I'm almost positive this is in more than one episode.