hehehe
Get out your copy of the DVD and fast-forward through the "making of" bonus clip. There's a segment toward the end where Ahhnold is being chased by some "wild wolves" and is supposed to climb up on some rocks to get away. It's one of the first scenes he ever filmed.
He slips, the evil-looking wolves (dogs) catch up and start tearing his costume (rrrrriiiiip!), and he falls backwards over the rocks and out of view. He yells "Aaahhhhhhhh!" as he falls backward, and then after a second, disgustedly, he yells "God-damn it!" in his inimitable accent. It's freakin' hilarious!