Archie uses a fire extinguisher the disperse a crowd. This sets off a fire alarm and sometime later, triggers the fire sprinkler system. Neither of these would be triggered by the extinguisher.
Milly's dress gets caught in the rear sprocket of her bicycle. This would lock up the rear wheel causing the bike to skid to a halt, rather than catapulting her over the handlebars as shown.
Billy Walsh is showing riding to school on a motorcycle without a helmet which is a legal requirement in the UK. He would be stopped by the first police he encounters.
Additionally, the motorcycle he is riding can only be ridden in the UK by someone of a minimum age of 21, which he clearly is not.
Additionally, the motorcycle he is riding can only be ridden in the UK by someone of a minimum age of 21, which he clearly is not.
Near the end of the movie when Milly receives a text message from Billy, her phone shows that the previous message was from the "Love Doctor".
However, this message was sent weeks ago (before Millie and Archie stopped talking). It is very unlikely that Milly would have received just one message in all this time.
However, this message was sent weeks ago (before Millie and Archie stopped talking). It is very unlikely that Milly would have received just one message in all this time.