A good example of difference in falling weights Wouter would have been to compare a 1kg weight cube of lead (or any weighted cube of lead) to a peregrine falcon of much less than a kilogram falling from the same great height. The lead weight will reach a constant "terminal" velocity at a much, much lesser "speed" than the Peregrine falcon (not flying but simply "falling in a dive under its own weight") this comparison ilustrates "form" and "drag" over "grunt" quite dramatically