Long-time collaborators Sean Lau Ching Wan and Louis Koo Tin Lok play a pair of firemen brothers trying to rescue people from a burning office tower in their new movie, Out Of Inferno.
The serious firefighting drama features many scenes of massive fires and the actors are not ashamed to admit that they felt "nervous" on the set when they had to do most of the stunts themselves.
The film's fire scenes are a combination of real footage of fire and computer- generated imagery. Reportedly, 70per cent of what is seen onscreen are real flames.
Koo, 42, says: "There were some scenes where the script said a stunt double would come in. But when we were about to start filming, we didn't see any stunt doubles, so we ended up having to do a lot of the action stuff on our own."
Lau, 49, adds: "Of course, if you're very scared, you can tell the directors and they will arrange for a double. But as two male actors, we just decided to keep that to ourselves and go in and do the stunts."
The film also stars Malaysian actress Lee Sinje, 37, who is married to the film's co-director Oxide Pang in real life.
Ask if there was any pressure acting opposite her and Koo, ever ready with a joke, says: "Even though she plays Ching Wan's wife, I ended up having a lot more scenes with her. And as soon as I knew that, I felt reassured, because the director will protect me from harm since he has to protect his wife, right?"
More seriously, Lau says: "Sinje is an excellent actress and she does not get any preferential treatment on the set. You don't even think about whether she's married to the director or not. You just do your part and she does hers."
Put the two actors together in the same room and some black humour is inevitable. Although they are here to promote the serious fire drama, they keep cracking jokes as though they were plugging a madcap comedy.