So you can boost your moving speed with the Ballista and it makes you go insanely fast if you can time jumping right and combine that with the better air movement perk there are a lot of jumps that can be skipped especially on the Doom Hunter Base mission. You can essentially bunny hop as well doing this using the Ballista as long as the jumps are timed otherwise you will end up accidentally double jumping.

Can you make a video of this?

Hi there! Thanks for the message :) Ballista Boosting was already known because its almost the same as Gauss Boosting from DOOM 2016. Also, we use a trick called Slope Boosting to skip nearly all of DOOM Hunter Base :D