I just reviewed the altitude graph. Let's just hope that was a planned manoeuvre/altitude test after takeoff just in case they had to turn back quickly.
ummm...yep...they took the plane to 32000 ft. then dropped to 10000 feet..they were testing the plane, whats the big deal....plane leaves today if it did not already, it is quite foggy in Los Angeles at the moment so some delays should be expected....