Goofs

In the scene where Red and Chong walk into the music store, Chong picks up a Fender Stratocaster and starts playing. The camera cuts around the store and, when it cuts back to Chong, he is suddenly playing a Gibson Les Paul.

In the welfare office, the long string of numbers coming from the dispenser varies in length throughout the scene.

The amount of "coke" on Cheech's face in the van varies between shots.

Chong tells Red his father was Chinese. In Up in Smoke (1978) his father was white.

In the earlier film he was playing Tony Stoner; in this film he is just playing Chong. Although they exhibit the same traits, they are different characters.

Chong mispronounces pendejo as "bendecko" and Cheech doesn't correct him. When they crash into the family's house, Chong calls them "Pendejos" correctly.

Chong doesn't really know how to pronounce this word correctly as he obviously doesn't speak Spanish, so obviously he's going to get it wrong sometimes.

When Chong is urinating out of the open bathroom window, the camera pulls back slightly and reveals that the "pee" is actually water running from a sponge being held just off frame. The crew member holding the trickling garden hose quickly pulls his hand out of frame, but not fast enough.

When Chong and Red are walking around the hotel with Red's luggage, the camera tilts and pans to keep them on screen. As the camera moves, shadows of the camera and crew become visible at the bottom left corner of the screen.