The engine noise of Cindy's Ford Escort XR3i Cabriolet, when it zooms through several shots, sound far differently to the Ford CVH of the actual car, indicating that the engine noise has been dubbed over.
When Cindy (played by Cynthia Rothrock) is fighting a bunch of goons on the scaffolding, she kicks someone in the back and be buckles backwards, wedged in between two poles of scaffolding. It is so painstakingly obvious that it is a dummy she kicks, and they didn't even try to hide it. Just look at the face and the way it hangs there.