Robotic Rampage
The game starts after a discovery of a potential plot within the office, centering on Mr. Sparkles. However, before he could be dealt with, he was vaporized by a metallic robot intent on destroying Sam & Max. As you quickly discovered, bullets are ineffective against the robot. As such, you need to exit the building to get a better view of the situation and robot.
The giant two-story robot has a wind-up located on the back, which needs to be removed.
As bullets are ineffective against the robot, and there are no items immediatly available for use, your best option is to talk to the robot and figure out why it is attacking. It will state that it's sole purpose is destruction and that it has no free will. While it believes that it can answer any question, it has trouble on "Why do fools make love?", causing it to turn away from the building for a few moments to ponder the question. This allows Sam to reach the wind-up key from the window to disable the robot, causing it to enter an existential crisis before collapsing.
As you return to the robot below, you discover that the robot was a present from Santa.