I know its annoying when the instructor cancels , you get yourself all hyped up for it, but dont forget they have a life as well, my poor hubby had a bad back a week or so ago and was in such pain but only cancelled 2 days, he could'nt even stand, but felt bad about letting his pupils down so went back too early, but craftily he told them no jolting the car his back hurt and would you believe he had no stalling or any problems he said maybe he could try that again lol ;D