- The Danza: Pablo is played by Pablo Rosso. Who is a cameraman in Real Life.
- Enforced Method Acting:
- During the filming of the scene where Alex (the young fireman) falls from the stairs, not a single actor knew that was going to happen, so the reactions we see on the films were the real reactions of the actors themselves.
- They didn't know that Jennifer (the little girl) was going to be infected either, they thought she really was just sick.
- Manu didn't act as if he hurt his ankle, that actually happened during the filming, and he didn't stop.