sentence: A man is showing off his motorbike. sentence:  He gives a small talk about his bike first. sentence:  Then he drives his bike on the track. sentence:  He then does quick demonstrations on how his bike moves and how it sits. sentence:  He then talks more about his bike while sitting on his bike. sentence:  He then drives around a flat dirt track while cutting a few times to his talks describing his techniques. sentence:  He ends by talking about his bike some more.