Why riding a roller coaster as tall as the Burj Khalifa could kill you

Kingda Ka is the tallest roller coaster in the world. At 139 meters, it's nearly the height of the Great Pyramid of Giza.
But what if someone built a roller coaster as tall as the Burj Khalifa, the tallest building in the world?Although the engineering would be possible, it wouldn't be safe to ride because intense wind resistance, flying pieces of debris, and bird strikes could injure or even kill riders.
Plus, the high g-forces could cause people to blackout as blood moves away from their head