How do I create a backflip animation where the character actually jumps backwards?

Creating a stationary backflip is no problem. Getting the player to actually jump backwards, however, has caused some difficulty.

My first attempt was to make the animation stationary and then use Velocity to move the character back. Although both the 'bump back' and the animation worked fine on their own, putting the two together caused problems. Setting the velocity of the torso caused the animation to stop mid-way through (as soon as the Velocity was changed), and not finish playing.

My second attempt was to build the movement into the animation, but this didn't work either. Animations are only created around a HumanoidRootPart, so while all the other parts of my character moved, the HumanoidRootPart did not. This caused both the camera to stay in the same position and the character to snap back to the HumanoidRootPart after the animation was finished.

Although all my code is functional, neither method worked. Do you know of a new, better one?

EDIT

Code:

local plr = game.Players.LocalPlayer
    repeat wait() until plr.Character
local chr = plr.Character
local hum = chr:WaitForChild("Humanoid")
local root = chr:WaitForChild("HumanoidRootPart")

local mouse = plr:GetMouse()
local anim = workspace:WaitForChild("Animation")
local canPlay = true

mouse.KeyDown:connect(function(key)
    if key:lower() == "q" and canPlay then
        canPlay = false
        local animTrack = hum:LoadAnimation(anim)
        local bt = Instance.new("BodyThrust",root)
        bt.force = Vector3.new(0,0,4000)
        animTrack:Play()
        wait(0.4)--Anim. time
        bt:Destroy()
        wait(1)
        canPlay = true
    end
end)