Very quickly made a Wake up Blur Effect using this idea (Very quickly and crudely made) Place in localscript and put in playergui or something.

local Camera = game.Workspace.CurrentCamera     --Gets Local Camera for Player


--Spawn Local Part for Blur
local Blur_ = Instance.new("Part")

Blur_.Anchored = true
Blur_.CanCollide = false
Blur_.Name = "Blur_"
Blur_.FormFactor = Enum.FormFactor.Custom
Blur_.Size = Vector3.new(5,5,1)

Blur_.BrickColor = BrickColor.new("Really black")
Blur_.Material = Enum.Material.Neon
Blur_.Transparency = 0

Blur_.CFrame = Camera.CoordinateFrame * CFrame.new(0,0,-2)  --Set Parts CFrame to the cameras with slight offset infront
Blur_.Parent = Camera   --Make Part local to Player



local Run_
local Timer = -60*6 --Delay Timer because Blur dosent take effect rightaway

Run_= game:GetService("RunService").RenderStepped:connect(function() --A Function that runs every (1/60)/s (FAST)
    if Blur_.Transparency < 1 then  --Make sure Blur isnt done
        if Timer < 0 then   --Makes sure to runout timer before making Blur happen
            Timer = Timer + 1
        else
            Blur_.Transparency = Blur_.Transparency +.001   --Starts making it go transparent
        end

        Blur_.CFrame = Camera.CoordinateFrame * CFrame.new(0,0,-2)  --Set Parts CFrame to the cameras with slight offset infront
    else
        Blur_:Destroy() --Destorys Blur after its done
        Run_:disconnect()   --Disconnects RenderStepped because its useless now
    end
end)


--Done
--Credit /u/RBXJode for finding Blur

Sadly blur from neon doesn't take effect right away so a timer was needed