In the supermarket scene, when Luísa, Teresa, Pedro and João are shouting to attract people to the supermarket, it can be seen the shadow of the camera and the cameraman on the floor.
When the group enter the taxi for the first time, the camera and some crew's members can be seen reflected in the taxi's windows. The same thing in the red car.
When the boys are stuck in the store, the boom is seen at the top of the screen.