PowerPoint mistakes that drive people crazy
If you're using a laser pointer, you've got too many points.
I once watched a CEO use a laser pointer in a very intriguing, random way. You never really knew where his pointer was going next: the screen, the ceiling, your face.
I don't think it was intentional; he just didn't have a smooth technique. But laser pointers, pointed at the eye, can cause damage. The CEO's audience stayed awake that day, I think primarily out of fear.