I have an older pupil who wants to jump but they keep falling off , no matter what I DO OR SAY I cannot keep them on board . Instructions seem to go in one ear and out the other, they are riding a nice TB but he's just got too big a jump and pops them out every now and again , and boy do they hit the ground hard! Any suggestions , diplomacy has never been my strong suit, I tend to be a little blunt sometimes.