Gruber's talking to the hostages. He tells them that Mr. Takagi "won't be joining us for the rest of his life." The lesson? Obey me or die.
The elevator dings open, and who's in it but poor, dead Tony, who's wearing a Santa hat and a sweatshirt that has recently been doctored to say, "Now I have a machine gun. Ho-ho-ho." Listening to Hans Gruber say "Ho-ho-ho" is one of life's distinct pleasures, so feel free to rewind.
Needless to say, Gruber's more than a little peeved. Little does he know, McClane's on top of the elevator, listening to everything Gruber is saying. He learns Gruber's first name, Hans, and that the still-alive blond guy is named Karl. Apparently Tony Sweatpants was his brother.
Gruber tells Karl that his brother's dead, and the blondest man in the universe promptly overturns a desk. He's out for blood, but Gruber is more concerned about his own goal: the dough.
As Holly watches, she knows McClane's alive and fighting back. She seems pretty proud.