Fires a very inaccurate projectile at low power with tiny explosion radius which does only 1 damage. It is considered a joke weapon. By inaccurate, we mean absolutely no accuracy whatsoever. You have no control of which way the lemon goes once it leaves your nozzle. Even the CPU-10 cannot aim this weapon.
The only time this weapon can be useful is if a player is covered in dirt or in a similar situation where the player's own shot is likely to hit him/herself and lose points; the lemon will not destroy much of the dirt, but the hit will only cost the player 1 point.