Scheduled at the Mayo Clinic to have tests done to discover the root of his migraine trouble, Steve Francis decided that practice was more important, writes Jonathan Feigen of the Houston Chronicle.  Francis was supposed to miss the team's practice on Monday and the game against the Clippers on Tuesday as he went to Minnesota for the testing.  Instead, ashamed of his 3 for 15 outing (plus 7 turnovers) in a win against the Celtics, he showed up for practice to work on his game.  From his quotes, it doesn't sound like Francis wants to go at all.  There is no indication that he has set an appointment for a later date with the Mayo Clinic.