The actors could not do more than a couple of takes a day while shooting the ice hovercraft chase because of the unpleasant combination of cold air and high speed.
The drawbridge sequence where Keanu Reeves is being chased by the Chicago P.D., F.B.I., and Brian Cox's henchmen took approximately one week of night shoots to film with temperatures ranging from five below to twenty below zero.
The scene in which Keanu Reeves barely escapes on the motorcycle was shot mainly with blue screens and explosion effects added in post-production. The live sequences had Reeves riding a motorcycle hooked up to the back of truck with a camera filming tight close-ups.
Prior to the start of filming, Keanu Reeves had injured himself playing a pickup game of hockey in his native Canada. He injured his neck and back areas causing him to gain weight which explains his look in the film.
Nick Offerman was cast to play Kenny's building super, but found out both his scenes were cut out at the film's premiere. It would have been one of his first films.