The Aggressives  is a 2005 South Korean film about a teen, Soyo, whose parents have abandoned him to fend for himself. He becomes immersed in the local inline skating subculture, and falls in love with the girlfriend of his skating tutor. 

A complete beginner, he practices at first in a hidden corner of the park. Here, he meets a group of wild skaters and immediately, one skater, Mogi  catches his eye. His adventurous jumps and breathtaking loops defy all laws of gravity. Mogi is without doubt the star of the group. His stunts, his style and the cool way he executes even the most daring of figures are unrivalled. 

• Collision- in an elastic collision, momentum and kinetic energy are conserved. This is for when you just begin skating or aren't very good, you tend to fall and run into things which causes collision.
• Newtons 1st law- This is also known as the Law of Motion. This law states that if there is a net force force extended on an object is zero, the object continues on its original motion. If you do not have any breaks, then the only way you can stop yourself is if you were to run into to something that is in your way.
• Work- this is defined as the product of the component of the force along with the direction of displacement and the magnitude of displacement. This is like if you are learning to how to skate. The person teaching you may have to hold you up, therefore, you are doing work.