Noticed on speedruns that runners are apparently able to jump immediately after using the special. Any tips on how to do it? I did it once, but it was a short little hop upward. Any way to do this consistently?

You can either press/mash start to pause and see if you get the frame you can jump (Gunvolt will be transitioning from facing left to facing right), and then hold jump after unpausing to buffer it, or just time your jump press. On PC it's a frame perfect input so good luck.