When Simon is video calling Lucy in the internet café, the image of himself on the laptop screen is supposed to show the view from his webcam but is actually a completely different video recording: his head moves at different times, he speaks at different times and he seems to be in a completely different setting.
During Jay's Australia monologue, the calender behind his left shoulder, that is going up by a day each time a girl's head pops up from beneath the sheets, skips the 9th, when he is describing how he is woken up by a different girl each morning.
Will McKenzie: Playing the guitar badly, wearing beads, talking about 'one love' and pretending you are friends with Central American villagers - who, by the way, despise you - before heading back to your parents five-bedroomed house in Surrey, doesn't make you a spiritual person, it makes you a bell-end.