It occurs to me that that the range of ones ejaculate may be enhanced by judicious timing of the pelvic thrust... perhaps an accelerating rotary hip motion culminating in the "fling" at the precisely optimum moment, somewhat in the manner of the Olympic hammer throw, would be conducive to the accomplishment of this feat... although I find it slightly less than credible that it could be done lying down, and the projectile would therefore proceed in an horizontal rather than vertical direction.
I believe a rigorous scientific evaluation is in order.