to this:

This is one of the most important things in the world.
Unstoppable 3
In the cinema there are two versions +12 and +18. What are you doing at +18? I did not guess. They smoke!
This is one of the most important things in the world.

And I went to "City of Sins 2", so there just before the movie appeared a huge warning "This film contains scenes of smoking. Smoking is dangerous to your health". Apparently, these are the most dangerous for teenagers scenes that can be in a modern film.