Continuity mistake: At the end of the scene at the Air Force base, when Jimmy is about to snap the photo of the military members with "Fudge", the film students roll Fudge in this wheelchair over to pose by Fifi, the B-29. At this moment, they've just scrambled to get Fudge back in the chair with the movie camera on his lap, concealed by the plaid blanket. The blanket is in view as the boys roll Fudge over there. We then cut to Jimmy, crouching with a disposable camera given to him by the USAF captain. Cut back to the group posing, Jimmy says, "Smile!" and Fudge says, "Cheese!" In this brief moment, the blanket on Fudge's lap is suddenly gone, along with the camera. You can see Fudge seated in his costume, holding up his bottle of water, but no blanket, no camera. Cut back to Jimmy, shaking his head. Then cut back to the group posing, and the blanket is back in place on Fudge's lap. (00:30:45)
Continuity mistake: The sun changes considerably when Mike is scoping out the garage. At the beginning of the scene it is late afternoon. When the larger truck pulls in it is closer to noon.
Answer: It might be the Panavision cap he wore when directing his terrible commercials.