A motorcyclist was killed after a massive sinkhole suddenly opened on a six-lane road in eastern Seoul.⁣ ⁣ Dash cam footage shows traffic moving normally—until the ground collapses beneath him.⁣ ⁣ The 20-meter-deep sinkhole took search teams 18 hours to recover his body.⁣ ⁣ An investigation is now underway.⁣ ⁣ #Seoul #Sinkhole #RoadCollapse #SouthKorea