The new Naked Gun has one subtle reference that doesn't point back to the original film trilogy, but much further - to the TV series that served as the blueprint for all three movies. In other words, it's a nod to Police Squad! from 1982.
In the final scene of the new film, everyone around the main characters suddenly freezes, while the protagonists themselves are confused about what's happening - yet they're still able to move:
In the final scene of the new film, everyone around the main characters suddenly freezes, while the protagonists themselves are confused about what's happening - yet they're still able to move:
This is a direct callback to the endings of every episode of "Police Squad!". That exact gag happened each time - for example, here's how episode two ends:





