We'd be absolutely foolish to believe we understood the life forms and energies at work in this world and beyond.
If aliens exist, and they are able to change direction when flying as fast as objects do in that space shuttle footage - 90 degree turns at 1000 mph - then they'd need to be of some energy form, which this could be.
Or maybe the dead do walk among us, and that guy is all about leaving it on the gym floor.