These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Big Lipped Alligator Moment: The power station fight in the second movie, which turns into a kaiju parody with caricatures of the two combatants.
When Venus first meets Bai Ling's character, she throws a tantrum, and his full body Tourettes' starts acting up. Cue twitch dance off.
In the climax of the first film, Chev randomly bleats like a goat.
The second film is much more cartoonish, random, and violent than the first.
Crosses the Line Twice: Especially noticeable in Crank: High Voltage, which might be one of the best examples of how to do this trope right. There are so many stereotypes and so much over-the-top violence, it manages to skip over "Offensive" and come back around to "Funny."
Violence against women: Bad. Stripper getting shot in her breast implants, which then ooze out and deflate while she cries: Hilarious.
There are A LOT of Asian stereotypes, especially in the second film. Then again, it is the late David Carradine...
Which doubles around to funny in the sequel, when we find out his goodbye message was drowned out by the wind.
Designated Hero: Chelios is an exceptionally violent, uncaring individual established to be a mob hitman and he will generally wreck anyone's day at the slightest excuse. The only real reason he's established as the good guy with any clarity is that everyone else is even worse.