The opening action scene took six months of training and four days to shoot.
Carrie-Anne Moss performed the shots featuring Trinity at the beginning of the film, and all the wire stunts throughout, herself.
Carrie-Anne Moss twisted her ankle while shooting one of her scenes, but decided not to tell anyone until after filming, so they wouldn't re-cast her.
The studio insisted on a great deal of explanatory dialogue, as they described the screenplay as "the script that nobody understands."
According to costume designer Kym Barrett, Trinity's costume was made with cheap PVC because of the much tighter budget. Similarly, Neo's coat wasn't actually a very expensive fabric. It was a wool blend purchased for $3 a yard.