Way too difficult to unselect a building. I'll hit the left mouse button in an open area and nothing happens. Do it again, nothing happens, smash the button 10 times and it finally unselects.
Get the Omega glider and go high in the air. Once there dive so you max out your speed and then hold down the left or right arrow key to make yourself sick.
No it doesn't work like that, but its a alternative to heavy path finding