When Norm is going through the various shades of white to Rebecca at the start of the program, and she pours him a beer, he has two full glasses on the bar- then one of them disappears mid conversation.
When Carla is tripped and does a front flip while holding her tray upright the whole time, the beer glasses on the tray are unspilled. On closer examination, though, the stunt double who performs the flip inverts the entire tray by the end of the flip, yet the "glasses of beer" remain attached to it and don't spill any liquid.
When Carla is telling Norm that she just has to kiss up to the judges in the contest, in order to win the car...you can see Norm attempt to give Carla a five, but she looks away that exact moment and leaves Norm hanging.