Here's why:
* Smoking in movies was common in the 80s and 90s: The era when Dudikoff starred in action films saw widespread smoking in movies. It was considered a common, almost mundane, activity for many characters.
* No specific smoking "debut": It's unlikely that Dudikoff consciously decided on a specific movie to start smoking. It was likely a part of his character development in various films.
* Not a constant habit: Dudikoff didn't always smoke in his roles. Some characters he played may have been non-smokers.
To pinpoint a specific movie where he "started smoking" would be difficult and likely based on subjective interpretations.
If you're curious about his smoking habits in a specific film, you can always research it further, or watch the movie yourself to observe his behavior.