This was the method that they decided to go with in The Mummy, and since Tom Cruise is a guy who doesn’t mind hanging from airplanes or the world’s tallest building, you can bet he wasn’t going to let any stunt double pull this one off for him.
Pulling off weightlessness in the movies can be done one of two ways.
You can put your actors in harnesses and fake it with CGI, or you can go straight up in the air and then drop really fast in order to make it happen for real.