Factual error: When Chong is playing his guitar, using a monkey wrench as a slide, he moves it the wrong direction on the neck of the guitar to make the sounds coming from the guitar.

Revealing: When one of them is using the bathroom - out of the bathroom window and it sprinkles on his neighbor's flowers, watch when the camera view goes up because you can see someone pouring water or something out of a cup to look like his pee.

Continuity: In the welfare office as Chong is pulling the numbers out of the number machine he sits down and the number chain falls to the floor, but when the shot switches back to the guy yelling at the woman behind the counter the numbers are still strung tight in the background.