I've always loved roller coasters. I've been several times to the Six Flags Great Adventure theme park, which is home to many world record coasters.
Kinda Ka is great, the tallest coaster in the world... It's a very short ride, but it sure is crazy. It's not uncommon for the coaster to not make it to the top and roll back to the start, only to have to try again. This was actually the first 'real' roller coaster I had ever been on, and the ride before more me was a rollback, so I was pretty anxious about it xD Since then, I've been on it quite a few times in the front row.