The bug causes the player to fire the Gluon Beam without using any ammo.
It doesn’t deal any damage at all, but it spawns decals and light.
How to reproduce:
- Get gluon gun,
- Hold fire1,
- Press ‘Z’ to zoom,
- Release fire1
Voilá, you now have a much better and cooler flashlight than the hev suit flashlight.
Can be done without wasting any ammo at all if you’re quick enough.