Brett Rounsaville, star and creator of Web series "Amtrekker," had a list of 50 cool things he wanted to do, and he documented his travels on video day-by-day. On the list: hiking to the bottom of the Grand Canyon, creating a crop circle and participating in a Civil War re-enactment. Also on that list was riding the world's fastest rollercoaster, which apparently is the "Kingda-Ka" at Six Flags Great Adventure in New Jersey. To accomplish his roller-coaster goal, Mr. Rounsaville took a train, stayed up for days and waited seven months for just a few seconds of joyriding. "Kingda-Ka" accelerates to 128 miles per hour in 3.5 seconds and is 453 feet tall. But getting to the park proved challenging. Mr. Rounsaville didn't make it to Six Flags in time the first time he tried, arriving just hours after the park had closed for the season. He managed to cross the ride off his list on his second attempt. The video has earned more than 34,000 views since April.