You can also get there without using the pause glitch. You need to get on the balcony of one of the nearby buildings (kind of hard, but doable), the glide on top of the tunnel which leads from the city to the lair.
This reply is late but he has the fov higher up (field of view) and it looks like you are going faster the higher you have it. You can turn this on by going to settings, then go to video and slide the bar up on the fov
