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You see Kratos killing/slaughtering/dismembering all of the monkeys. Upon returning to the Time Station, the professor is clearly upset with Kratos, yelling "YOU'RE SUPPOSED TO CATCH THEM NOT KILL TH-"
He is interrupted by Kratos grabbing him by the back of the head and smashing his face into a bloody pulp against the control panel (which is done by the player being prompted to press square repeatedly), with Natalie screaming in horror.