The use of repetition

Should you repeat something during a lecture ?

People are lazy, the brain is lazy. If you want make an real impact, you can repeat, twice, three times or more.

This video is a state-or-art of repetition ! The iphone is a great phone. But when it was launched, many phones already played music and browsed on the web. But with such a repetition, it seems extraordinary.



Another use of repetition, maybe too much this time :D