Given the question: Generate a question about the following movie plot: Charles Morse (Anthony Hopkins), a billionaire, and two other men, Robert "Bob" Green (Alec Baldwin), a photographer, and Stephen (Harold Perrineau), his assistant, arrive in a remote North America locale via Charles's private jet, along with Charles's much-younger wife, Mickey (Elle MacPherson), a beautiful fashion model. The group is here for a photo shoot and are the only guests at a lodge. Styles (L.Q. Jones), the proprietor, warns everyone that the region is inhabited by bears and not to leave food uncovered. The party also celebrate Charles' birthday, and Mickey gives him an engraved pocket watch. Bob's present is an expensive hunting knife.When Bob's male model gets sick, he invites Charles to fly with him and Stephen to a different location where a characterized Indian is hunting. In mid-air, Charles, suspecting Bob and Mickey are having an affair after he sees Bob kiss Mickey on the cheek, cryptically asks how Bob is planning to kill him. Before the conversation goes any further, the plane suddenly hits a flock of birds and nose-dives into a lake, killing the pilot. Charles, Bob, and Stephen barely escape safely to shore.Lost, wet, and freezing, the men, knowing the plane was off course, attempt to hike to a more likely search area, only to find that a Kodiak Bear is stalking them. They elude it, but later that night, the Bear attacks their camp and kills Stephen.On the run from the Bear, Charles and Bob have little chance of rescue. Though not an outdoorsman, Charles draws upon his encyclopedic survival knowledge to guide them, and the men work together, bonding somewhat. The Bear finds them, and in a struggle on a river bed, Charles impales it with a hand-carved spear, saving Bob's life.The two find an empty hunters' cabin containing some supplies, a rifle, and a canoe. As Charles is about to use the paper receipt from Mickey's birthday gift as tinder to light the stove, he notices on it that she also bought Bob an expensive wristwatch engraved with an intimate inscription. Charles realizes that...
The answer is:
What did Bob give Charles for his birthday?