Entroper on 05 January 2008
Apparently, most of the target shooting levels have secret areas, and inflating the scarecrow heads before decapitating them (each time you shoot them in the chest, their head inflates, up to 8 shots) is indeed the way to unlock the secret areas. If you successfully inflate and decapitate the first scarecrow, another one will appear in the second area. Inflate and decapitate it to access the secret third area, which is usually chock full of those special yellow bonus targets.
