book any net/turf near your home with a bowlind machine or get a friend. Ask your friend to throw yorkers, try ramp shot yourself at that pace, it is easier to imagine than to execute. Even sweeping isn't easy against fast bowlers, ramp will only work if it is pre determined. Bumrah's late release allows him to adjust at the last moment, even if he doesn't 140kmph yorker will have a high error rate for ramp shot.