Corrected entry: An old highschool classmate comes into the restaurant one day and flaunts his success. He gives Justin an insulting $100 tip and says, "You need it more than me." He is an engineer and mentions how many $Gs he's pulling per year. This is part of the epiphany which leads Justin to quit. Justin is embarrassed to be seen there as a waiter. But at a different part in the movie, Justin and Ryan Reynolds are talking about how much money they are pulling per week as waiters. If you do the math, he's actually making the same amount of money as his engineer old classmate. The writer should have had the engineer bragging about making $80k, not $40k.
Corrected entry: Dan calls the tow truck company before he knows the driver of the car is not going to Shenaniganz.
Corrected entry: Prior to when Monty brings Mitch outside to show him the dumpster area, we see Raddimus (Luis Guzman) and his girlfriend (is it Amy? I can't remember) walk across the screen from right to left. After Monty talks to Mitch for a minute or two we see Raddimus approach the two, again from the right side but we never see him get there as he walked back into the restaurant with his girlfriend.