usefull and advanced movements/techniques

If you can aim your zipline/jumps or even slides from high objects so that  when you hit the ground you JUST clip the edge of another ledge/object whilst sliding - it will project you forward and speed you back into a full slide.  Sliding off of the Repulsor wall for instance down the hill towards the watchtower, you can jump and crouch again just as your slide starts to slow and if you clip the road barriers or other low-ish objects just as you crouch in the air : you're treated as though you've restarted a fresh crouch slide from still and your speed increases.