good question about the picture. is that hood attached to that jacket? maybe the water goes into a trench and then runs down and drains out the front and if your bent over it would harmlessly fall between your legs.
if that hood is not attached to that jacket then there could be an issue. I use the shower cap and a high back collor cycling specific rain jacket $100 on sale for $50.
there are some long tailed head sweats that might carry the water over and away from thte back of your neck. do you have a cycling specific rain jacket with a high back collar?
http://www.rei.com/product/718308
http://www.boure.com/8554.html
http://circle-360.blogspot.com/2009/...ackets_21.html
http://www.guardian.co.uk/environmen...-cycle-jackets
http://www.cogandchain.com/?p=112
http://www.bikedock.com/posit/shop/i...manf=&format=1
http://www.highsnobiety.com/news/tag/baracuta/
http://www.motorcycle-usa.com/410/44...bs-Review.aspx