Trolling physics...
->[EDIT] Also, I just won a copy of "Stalker: Call of Pripyat". I really hate the physics in this game, and especially the "instant-duck" ... not mentioning the recoil. For some reason, I feel the recoil is better in shadow of Chernobyl.[/EDIT]<-
A friend gave me this. I can't stop laughing =)).
XD
I would recommend finding a walkthrough to find all the tools, because you MIGHT find ONE of the 6 sets on your own.
I'll tell you now that you won't find either of the 2 calibration tools until you reach Pripyat.
Also, find the Oasis. You'll never have to stock food again. Ever.