Despite the high-tech premise, director Len Wiseman and Bruce Willis insisted on maintaining the franchise's legacy of practical stunt work .
: Originally a standalone script titled WW3.com , the project was stalled after 9/11 before being repurposed as a Die Hard sequel.
: The film famously featured a car being launched into a helicopter and a massive tunnel pile-up involving real vehicles.
: The commitment to realism came at a cost; both Bruce Willis and his stunt double sustained injuries during the grueling production. Reception and the PG-13 Controversy