Continuity mistake: The glass that was dropped and shattered on the floor had a different pattern of fragments when Mitch [Robin Williams] knelt to clean it up. Most obvious was that the majority of shattered pieces settled toward Mitch's feet but were on the opposite side of the largest piece of glass during clean-up. There's also a "stupidity" in the way Mitch wiped up the glass - pressing down on the thin towel (apparently to entrap fragments), which is most likely to result in getting pierced. (00:01:40)
Continuity mistake: Rancer was shoving dinner rolls into his mouth, demonstrating his competitive eating ability/skill. He still had some in his mouth, but after he ran his hand over his mouth, there suddenly was no sign of any food in his mouth. (00:16:10)