It doesn't have one for splash weapons. Splash weapons aren't even thrown weapons technically. they are a special attack. And I agree with Loremaster. Seriously, the fumble tables make 0 sense. Someone trained with a weapon that fails miserably will at worst be off-balance and open to attack. Someone trained will not drop the weapon. And someone trianed to throw high explosives and who has Throw Anything really can't fail at throwing what they want :P