Inspired by one of the links there: dear anybody listening, if you're going to show a bunch of comparison photos/screen grabs, or before/after screen shots, and the like - e.g., http://www.colourblindawareness.org/ - don't put a scroll effect in. Don't put a fade down then fade up effect in. It makes it too hard to see the difference. Just flick instantly between one and the next.