Not to detract in any way from the serious discussion going on here, but furthering the research into the waterskiing hypothesis...
If "anything is possible except waterskiing through a revolving door" then we shall have to consider Skeptic's dematerialization theory. However, we don't want to rely on it too greatly as it seems a bit of a cop-out and the other sceptics will start to complain as they are wont to do, so how about it if the bikini clasp dematerializes? (Stop me if this bothers you Bonnie, this is purely in the interest of science, and as a fellow female (is that an oxymoron?) I am fascinated by the reasoning behind the theory and not the actual bikini top removal.) This removes Amos from the equation, neatly avoiding the reflex and unfastening time, thus freeing up more seconds for the trick of passing through the revolving door. Here, as well, I have made an important discovery while carrying out important scientific research (under the guise of shopping) - those doors don't have to be divided into quarters! You can get revolving doors which merely split the door in two! This gives us a much better chance of dispproving the original hypothesis, therefore it may be perfectly feasible to waterski through a revolving door, therefore anything's possible, therefore we have the universe compltetly sussed, and those infinite number of monkeys with typewriters are holding a book signing as we speak. Not bad for a Friday morning.