Defeating Shadow Claw
Hit the little targets on the ground. However, wait for Shadow Claw to be standing on the same target. Light will flow through, and Shadow Claw will turn into tiny little creatures. Hit the little creatures with a hammer until they are all dead.
Reflection In The Gun
When you play as the Tom Tom Gang by a Winterfield Sniper Rifle, Carlos will ask you if you are going to the lockers. Answer 'Yes' and equip the sniper rifle as your second weapon. When you get out of the lockers, change your weapon so that the sniper rifle is on your back. When you zoom in on his back, you can see in the reflection of his gun a village with tall buildings. If you turn around, none of those things are there.