Funny Extremely Scary Ghost Elevator Prank in Brazil

I don't think this is so funny. You people are gonna cause some heartattacks. 
Some people were really scared. Even I would be. 
You're lucky no one punched the girl because they thought it wasn't real. 
This is good to give someone a heart attack. I wonder how funny this would still be if somebody had had a stroke in the elevator, or get traumatized for life