sentence: A man talks while we view an object on the table. sentence:   The man picks up and holds the object. sentence:   The man shifts the seat of a bike. sentence:   The man uses the object from the table to tighten the seat of the bike. sentence:   The man checks the bike seat for looseness. sentence:   The man begins spinning the seat of the bike and removes it. sentence:     The man puts the seat back on the bike. sentence:   The man uses the tool to adjust the seat on the side. sentence:   The man checks the seat for tightness a last time.