Stop a weapon
What about of allowing the worm to stop using a weapon like flamethrower by pressing space ??
This could work too in , minigun , uzi etc
It can be useful for making just a bit of damage when moving the sight dont work.
This will be pretty useful for the Multishot (shot doesn't end turn) feature and can be easier to escape from a fire that is falling (if you used the flamethrower aiming up).