The final track piece of the 41-story Zumanjaro: Drop of Doom — which will send riders back to earth at 90 mph — was locked into position at Jackson's Six Flags Great Adventure on Tuesday.Iron workers from Matawan-based Shamrock Construction signed the final orange segment before lifting it to its final resting place on the tower.Workers will now focus on installing the winch-and-cable lift mechanism, three gondolas to whisk riders to the top of the tower and ride controls.The attraction will then be extensively tested, inspected and certified before — it's hoped — being opened on Memorial Day weekend."Today is special, not only as we broke the world record by topping off the world's tallest drop ride," said park president John Fitzgerald, according to NewsPlusNotes."But because we battled through some incredibly adverse weather conditions, we had the coldest and snowiest winter that any of us can remember," he added.The new ride is connected to the iconic Kingda Ka roller coaster — the 456-foot monster that ranks as the world's tallest coaster and fastest in North America — which launches riders up to 128 mph.Riders will pause for a few terrifying moments 41 stories in the air on Zumanjaro, higher than London's Big Ben and twice as tall as the Statue of Liberty.Then, after catching a glimpse of the skyscrapers in Philadelphia 52 miles to the south, gravity will plunge them back to ground level in less than 10 seconds.(nydailynews.com)ANN.Az