After Chris accidentally sticks his hand in the blender he leaves the shop and approaches the older black guy that's sitting on the bench. When he sits down beside him, you can clearly see that his hand is bloody and has a rag wrapped around it. When he gets up to sing about Maria the rag is gone....
After seeing the Welcome to Delaware sign, they pull off the highway and an Arco gas station is seen. Arco has more than 1,300 gas stations in the western part of the US and none in Delaware.
A cameraman is clearly visible in the crowd during the puke scene in the Electric Cowboy bar.
At about 8:55 into the movie, when Eric Andre is running to the entrance of Sam's Smoothies and knocks over the trash can, the person with the black backpack and headphones is actually a camera operator and is recording from a hidden camera in the backpack.