In line skating is a multi disciplinary and is a sport that's practiced all around the world
I didn't realize it was that popular. Where did it start?
Yeah its very  popular .  Not much info on that but i did find that inline skates typically have 2 to 5 wheels
I wonder if they have a brake pad too like roller skates?
Inline skating
Inline skating is a multi-disciplinary sport and can refer to a number of activities practiced using Inline skates. Inline skates typically have two to five polyurethane wheels, arranged in a single line by a metal or plastic frame on the underside of a boot. The in-line design allows for greater speed and maneuverability than traditional (or "quad") roller skates. Following this basic design principle, inline skates can be modified to varying degrees to accommodate niche disciplines.
Inline skating is commonly referred to
a bathing suit, which Nelson acknowledges made him start to wonder if something was off about this film. He did not fully realize what was going on until he got the part and was given the full script to read. Nelson explains, "It certainly was not a straight dramatic role, and it was only after they offered me the part that they gave me the full script to read and I realized how much blood was in it." Nelson believes that Ned used humor to hide his insecurities, especially around Brenda