Rusty, this is really about "touch" and its a very relevant discussion. Its very macroscopic to say simply we are absorbing the front of the bump, so therefore we slow down. There is a lot more to it then that. False physics will never get anyone to the truth, and its in the details like this where it matters. In the end, I suspect a lot of people do things intuitively the right way, even if they are talking about it wrong. Sense of touch is something that a lot of people do by feel without consciously being aware of what they are doing many times.
We use a sense to touch to interact with the pressures which are created as the bump face comes under our skis. Flexion is the bio mechanical means by which we can adjust exactly how that pressure either builds or is prevented from building and we do it in a dynamic way....over time.... We don't have to release all the pressure all at once. When we flex we are reducing pressure, by a variable amount. Absorbing it. That is definitely how we prevent the bump snow reaction force from launching us skyward. I think everyone understands that.
But how do we slow down with pressure then? If we flex so much as to completely eliminate that snow reaction force, then we would in that case also be eliminating slowing effects of the bump. In order to slow down we have to reduce the amount of absorption or flexion so that its not entirely so perfect, at least initially. As we approach the crest of the bump, if we want to stay on the snow, the absorption has to become more perfect, at the expense of reduced speed control. We are capable of using our sense of touch in a variable manner, particularly if its starting from one end of a spectrum and increasing to the other end of the spectrum. For example, at the base of the face of the bump, we flex/absorb less, receiving and embracing the pressure, which we feel as touch. And we can be in the process of gradually ramping up the flexion efforts as we move up the face of the bump, so that by the time we reach the top we are absorbing much more and through sense of touch feel ourselves become very light with little pressure right at the crest of the bump.
Also, its somewhat debatable about whether absorption on a virtual bump is not also applicable in some cases, so I don't think this is only applicable to bumps, though clearly its intuitively obvious that in order to avoid turning a bump into a jump or a tripping device, you have to absorb it in some way. Let's say its perhaps more mandatory in bump skiing then groomer skiing, but the concept of absorbing turn forces at the end of a turn can also apply...the virtual bump.