During the landfill sequence when the three friends make a fire, the landfill owner appears to ask them about the fire burning yet in the background during the whole scene there's no visible fire or smoke.
In the landfill sequences there are several cuts where the background settings change from night-time to early day-time in a matter of minutes, back and forth.
In the car sequences, the guys drive on Avenida Paulista for several times inter-cut with streets that aren't from the neighborhood. In one shot, they're on Paulista on the opposite side of MASP (the famous museum) then move down to Rua Da Consolação and then back to Paulista on the same previous side, which is illogical and only works if those guys were lost, making several turns to get back to the same place.