hopppa likes to

-- The first one is for sitting with a chance to trip. The second one is for just sitting.

DamageMod:RegisterWeaponPart(args[1], {part}, 0, function(hit)
	if hit:IsA"Player" then
		if hit.Character.Humanoid then
			if math.random(1,maxnumber) == maxnumber then        -- replace maxnumber with whatever
				hit.Character.Humanoid:ChangeState(Enum.HumanoidStateType.FallingDown)
			else
				hit.Character.Humanoid.Sit = true
			end
		end
	end
end)

DamageMod:RegisterWeaponPart(args[1], {part}, 0, function(hit)
	if hit:IsA"Player" then
		if hit.Character.Humanoid then
			hit.Character.Humanoid.Sit = true
		end
	end
end)