Another pilot asked me a good question the other day. He asked: If you are on an IFR flight plan and under ATC control, are you required to continue the heading assigned if you enter into class G? I assumed no because class G is uncontrolled but then I got to thinking, what would be the process that would take place there. Would ATC cancel your flight plan or could you keep it open and pick it back up on the other side of the class G if you were simply transitioning. Anybody have any info on this subject?