ROLLERCOASTER HOW TALL WILL THEY GET.I HOPE THEY GET UP TO 1,OOO FEET IN THE YEARS TO COME. THEY MAY GET UP TO 90,000 FEET IN YEARS FOR ROLLERCOASTER BUILDER THAT WOULD BE COOL FOR ALOT PEOPLE. KIDS COASTER MAY GET HIGHER THAN 10-35 FEET. I HOPE THEY WILL SOMEDAY BE 1,000 FEET IN 25 YEARS. WHO WOULD RIDE A COASTER THAT GOES 400 M.P.H.? I WOULD DO IT!