Before going north I assumed there wouldn’t be any fast people. Though I never had a problem with changing trains I often couldn’t cross four-lane streets at once because the green phases of the traffic lights were just sufficient to reach the traffic island in the middle of the road.
And at first it was hard to find the youth hostel because the house numbers aren’t counted the same way as in the rest of Germany where the odd numbers are on one side of the road and the even ones on the other. In Berlin they start on one end and then count up on one side turn around and continue on the other one. So numbers 9 and 34 may stand vis-à-vis.