return function()
    local ni = peripheral.wrap("back")

    local sneakTicks = 0
    local meta = nil
    local windowEvents = {nil, nil, nil}
    local windowDuration = 20
    local clockCounter = 0

    parallel.waitForAny(
    function() while _G._running do
        if meta and windowEvents[3] ~= nil and windowEvents[3] + windowDuration >= clockCounter then
            local mainHand = meta.heldItem and meta.heldItem.getMetadata().name
            local offHand = meta.offhandItem and meta.offhandItem.getMetadata().name
            if mainHand == "openblocks:hang_glider" or offHand == "openblocks:hang_glider" then
                ni.launch(meta.yaw, meta.pitch, 4)
            end
        end
        os.sleep(0.05)
    end end,
    function() while _G._running do
        meta = ni.getMetaOwner()
        clockCounter = clockCounter + 1
        if meta.isSneaking then
            sneakTicks = sneakTicks + 1
        elseif sneakTicks ~= 0 then
            windowEvents = {clockCounter, windowEvents[1], windowEvents[2]}
            sneakTicks = 0
        end
        os.sleep(0.05)
    end end)
end