Besides the larger amount of power required to perform a layout reverse hecht compared to a piked reverse hecht, the main difference between both skills is given by the way the bar is cleared during the flying phase. A true layout hecht clears the bar in a straight or hollow position without exhibiting any obvious hip flex.
Still 1 – Observe the position beginning to move over the rail.
Still 2 – Now notice that while the feet are beginning to clear the bar the gymnast is still hollow, but not piked
Take another look at the technical action that precedes the flying phase.
Video 2 – In this slow motion, once more, observe how the bar is released with a powerful throw, aiming to stand up the body in front of the rail. Take another look at the same video clip at regular speed.