heels-off-the end of the first swing, the flyer brings their knees up between their arms and puts their heels on the bar, making sure that their hips are up and they are in a compact position. Then the flyer looks behind them for the catcher. The catcher calls the hep, and the flyer "explodes" out to the catch.

hep-universal signal used instead of go, now, start...

hocks-off-like a knee hang, only the flyer brings their legs around the cables to hook them on the bar, instead of bringing them up to their chest to hook them over.

hook-short bar (not pole) with a hook, is attached to the platform by a small cord and used to catch the flying trapeze bar.