A sackson swipe is a back somersault, performed from a climb-up to swingthru. It was created by Scott Jackson (Sackson Geddit?) It stemmed from the Holy Grail Climb Up, a conversation with Alex Daggett and has similarities to the Scandrett swipe. It was done in the "Garden Training: Two" Video and was widely mistaken for an angel drop and the full version was mistaken for an angel drop 360/Full (which was also done by Scott in the video).
Sackson Swipe Full - Same move but with a full twisting back somersault.