Taking three steps in an NBA game without dribbling constitutes a travel, resulting in a turnover for the guilty party.
That rule doesn't seem to apply to Oklahoma City Thunder point guard D.J. Augustin, though, who seemingly took enough steps to get to the team bus in the second quarter Monday night against the Houston Rockets without getting called.
So why wasn't the whistle blown? You should probably go ahead and ask the official on the play, who had a clear view of Augustin's footwork every step (all five or six of them) of the way.