Rapid trigger is not the same as snap tap, rapid trigger just means the key doesn't need to be fully pressed down to input the keystroke, has nothing to do with nulls.

Hope I'm not necroing. I've tried my best to recreate the particles in the video. I wasn't able to get Tob's guide to work so I resorted to using the Particle Editor instead. Like before, this requires the spy sapper explosion script (or a crosshair changer that uses that explosion). The vpk includes the explosion particles, the stickybomb trail, and a medic heal effect. I DON'T know if these are "legal" in any competitive leagues as I don't play in any. Showcase and download can be found here: https://youtu.be/fwzkweEpzJg and here: https://www.mediafire.com/file/l1mqg2fi9kmzpwo/vouri_particles.vpk/file (the file goes in tf/custom/).