I tend flop down on the ground in order to gain enough
momentum to be able to roll over. Going down headfirst
may seem scary, but it is the best way to gain the speed
needed to make a full turn. Sometimes the flopping does
not happen as I misjudge the distance available to do a full turn.
This time the flopping partially succeeded as I forgot that
the couch was behind me so there was not the room
to do a full turn. I was able to get some air by moving
myself as I turned to have clearance for a half- roll.