@ boSs ^.^ he uses the ramp to boost his jump. What do you need to do that? Obviously a ramp, sv_airaccelerate 100, good fps and good stafe skill. You may ask how many fps are good? Well, the more fps you have the better, I would say at least 150, but you're gonna be really good at strafing. So, the more fps you have, the less strafe skills you'll need to get propelled.
This is the procedure: jump from the highest place that you can, then start strafing while you are in the air, head towards the ramp and when you touch it make sure to hold down the ctrl key. If you did it right, you will