A good example for the use of humour in a speech:
Ken Robinson says schools kill creativity

A good example for the use of gestures:
Lewis Pugh swims the North Pole

A good example of explaning difficult topics in an easy way:
Bonnie Bassler on how bacteria "talk"

A funny talk on how to make the ultimate TED-Talk:
Lies, damned lies and statistics

A good example of the use of the presentation prgramme PREZI:
Frederick Balagadde: Bio-lab on a microchip




I have a dream - Dr. Martin Luther King