Assassins Creed | Hey dude, what are you doing here? 

BTW, this bug repeated later: this scientist was standing somewhere near the guardian, and then I threw a knife at the guard, he fell off the roof of the house, and panic ensued on the street. The scientist also panicked and started jumping on the roofs. Eventually he found a ladder and going down. I tried to record that moment, but the program malfunctioned...