During the opening scene Howard, Sheldon, Raj and Leonard sit together in the break room with their meals while the drink bottle on Leonard's tray is never opened and remains full. As the camera angles change from points of view on opposite sides of the table, so does the label "Zero" rotate in order for the label to always remain readable. While the sequence continues, however, the view from over Leonard's shoulder is shot at times without rotating the bottle. That camera angle reveals a distinctly visible "Zero" label on the bottle, then a large red square symbol shows, returns again to the Zero label, and then is back displaying the large red square symbol view...all while the bottle remains full and unopened.
When Sheldon tells Penny about train cowcatchers, he describes them as being made of iron. However, the picture he shows her is of a mid- to late nineteenth century locomotive, which has a wood cowcatcher.
The premise of the episode is that Leonard and Rasj always get pushed around by Sheldon and Howard. This is inconsistent with their characters. Earlier on in the series, Leonard takes decisive charge when they develop an app as a group, even expelling Sheldon.