Bad Example:
Large images shifting significantly, and at different rates than the text or other elements
The first background image moves up 500px as the user scrolls, but the text moves up more quickly, plus this text fades away before it reaches the top.
This text moves quickly, compared to the background
The background image behind this text shifts from right to left as the user scrolls, which can be a confusing effect.
Curtain effect while you scroll darkens the background.
The text is again moving more quickly than the background image.
The End
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