Cynthia Rothrock accidentally struck a performer in the groin with a baseball bat during the filming of a fight scene in Martial Law II. The man in question had opted to be in the scene despite not being a professional stuntman and the injury occurred when he failed to roll in the right direction, necessitating a hospital visit.
The dojo that belongs to Dalton Rhodes in the film actually belonged to Benny "The Jet" Urquidez. It closed in 2007 to make way for a shopping mall.
John Saxon ("Enter the Dragon") and Brandon Lee (whose father Bruce co-starred with Saxon in ETD) were considered for the roles of Dalton Rhodes and Wu Han, respectively.
Riffed by the guys from MST3K under Rifftrax; Michael J. Nelson, Kevin Murphy and Bill Corbett
David Carradine and John Fujioka previously starred together on five episodes of Kung Fu.