Found this on a fan's Deviantart, not sure if they've been posted here before.
(https://s4ck.com/forums/proxy.php?request=http%3A%2F%2Forig08.deviantart.net%2F000f%2Ff%2F2015%2F247%2F1%2F5%2Fbelly_punching___mixed_boxing__gif__by_mixedboxingart-d98ep9g.gif&hash=9df60b1c8fff523349bac153af99a9aa8fdf634b) (http://fav.me/d98ep9g)
http://mixedboxingart.deviantart.com/