Michael Fodera, the actor portraying Sensei Clyde, really was punched in the face accidentally during the film's opening fight sequence. Since the punch looked so good, the filmmakers decided to keep that specific take in the final cut.
Real life martial arts expert, Sensei Luis Ruiz, loaned the production his own years-old black belt so Sensei Clyde's costume was more authentic looking.
This film is part of a larger episode from sketch comedy group, Kissing Sisters.