Originally posted by FrothByte
Do you understand physics? To negate any force you need to generate a force opposite to it. In this case, he'd need to generate an upwards force to counter the pull of gravity. If you watch his exit closely you'll notice that when he broke the cage his trajectory was diagonally pointed to the side and down. So he changed his trajectory but did nothing to counter the pull of gravity.
Magic>Physics
His hammer generates anti gravity, which is beyond real world psychics, which stopped his downwards trajectory.
What you are trying to say his "Thor didn't know what he was doing."
Wrong.