Have you ever been surfing? I did it alot when I was younger, I had a 6ft board but now I'm just afraid to go past waist deep in the water!
Yeah, surfing is great! Surfing waves are usually found in the ocean, but if you're afraid of deep water, they can also be found in lakes and rivers. Like standing waves, or tidal bores!
Oh wow I had no idea you could in lakes and rivers. I live in Florida so the beach is accessible! 
Absolutely! Even if your local area doesn't have them, you can make artificial waves! Just get a buddy with a boat to create some wakes for your to surf on!
Interesting. You can do it without being attached to the boat by a rope or handle of some sort?
If you're a novice you will probably want to hang on. After you've got some balance you can totally do it free hand!
I see. What other interesting facts do you know about surfing?
Well, most people think surfing requires a board. In technical terms, surfing is just riding a wave, board or not! So if a wave carries you over and crashes you down, you technically surfed!