If you are driving down the freeway, and decide to move the lever from drive to 2nd, and get confused, and by bad-habit depress the button, and slip into neutral and then into reverse, for just a split second, what happens? 

A. No harm, the torque converter et... et... what-ever-one-would-say... 
B. The Final Drive gets cooked. Howling is soon to follow. 
C. The Transmission gets a fresh influx of metal shavings. 
D. That money you have in the bank? Get ready to spend it. 
F. Nothing happens. Life goes on, and so does your Vanagon.