TIL Rob Lowe is uncredited in the film Tommy Boy because he was contractually obligated to another movie at the time, Steven King's The Stand. The reason he filmed Tommy Boy was due to his friendship with Chris Farley.
TIL that the FBI has an entire fake town for training agents. Hogan's Alley has a bank, post office, hotel, laundromat, barber shop, pool hall, shops, and homes. The town is populated by actors who roleplay parts like bystanders, terrorists, bank robbers, and drug dealers so scenarios always change