The slides are just the facts. Most presentation programs are full of special effects. They are sold by showing all the cool effects provided. Unfortunately, most first time builders try to use every effect available. Words and pictures come flying in from all directions.
Slides shake, shimmy and spin in and out.
Any movement is accompanied by other-worldly sounds or stirring sounds of great symphonies. Everything is awash is a riot of color and motion. In a large screen presentation, people have to leave because of motion sickness. This is bad design. Don't do it.