What was the first roller coaster with a 90 degree drop?
SheiKra was definitely not the first roller coaster with a vertical drop. Here’s two roller coasters that have 90 degree drops that came out before SheiKra. Oblivion at Alton Towers Mr. Freeze at Six Flags St. Louis and Six Flags Over Texas If you mean a diving coaster, then Oblivion would be the first vertical drop coaster, but it still wasn’t the first roller coaster with a vertical drop.