I enjoy inline skating, but it doesn't seem to be as popular. Do you know much about it?
a little, I do have a pair somewhere in my closet
Awesome! It's different from quad skates which have two front wheels and two back wheels. I enjoy my roller blades. 
who came up with the ideal of roller blades?
It was actually created to substitute ice skates for Russian athletes! How cool is that?
it sounds logical when you do not have any ice to skate on
That's true! Even though you aren't on ice, it can be hard to stop, so good thing they have brakes.