sentence: A black tool clip is sitting on a wooden table by itself and then suddenly someone grabs it and begins to turn it,to show the tools inside. sentence: A bike then appears and the person starts to move the seat back and forth illustrating its looseness. sentence: The tool is then inserted into the seat and it begins to get tightened. sentence: Once the seat is tight,the man then removes it out of the seat and then reinserts it to make sure it is properly positioned.