BodyVelocity just stopped moving object?

I'm just surprised. A few minutes ago, it was working fine (well the bodyvelocity was), and after I fixed some stuff (I forgot game was FE, so I forgot to set up remote events etc. to create parts), the fireball just didn't move.

(My script is 300 lines long, so I just narrowed it down to the part the fireball gets created.)

Here is the part that gets the fireball created:

local shot = game.ReplicatedStorage.CreateFireballShot:InvokeServer(script.Parent.Name, mouse.Hit.p)

And here is the script in ServerScriptService which listens for those remotes:

function game.ReplicatedStorage.CreateFireballShot.OnServerInvoke(plr, name, mpos)
            local shot = Instance.new("Part", workspace)
            shot.Name = "Shot/"..plr.Name.."/"..name
            game.Debris:AddItem(shot, 10)

            shot.BrickColor = BrickColor.new("Bright orange")
            shot.Size = Vector3.new(4,4,4)
            shot.Shape = "Ball"
            shot.Anchored = false
            shot.CanCollide = false
            shot.Transparency = 0.5
            shot.BottomSurface = "SmoothNoOutlines"
            shot.TopSurface = "SmoothNoOutlines"
            shot.FrontSurface = "SmoothNoOutlines"
            shot.BackSurface = "SmoothNoOutlines"
            shot.RightSurface = "SmoothNoOutlines"
            shot.LeftSurface = "SmoothNoOutlines"

            shot.CFrame = plr.Character.Torso.CFrame * CFrame.new(0, 0, -4)
            shot.CFrame = CFrame.new(shot.Position, mpos)

            local fire = Instance.new("Fire", shot)
            fire.Size = 15
            fire.Heat = 15

            local velo = Instance.new("BodyVelocity", shot)
            velo.maxForce = Vector3.new(math.huge, math.huge, math.huge)
            velo.velocity = shot.CFrame.lookVector * 80

            return shot
end

(Also narrowed it down ^)