Superman Seat Grab One Hander

See Video
Instructions:
 This trick starts out by learning
the standard superman seat grab.

grab hand: Hand which grabs  the hole in the airbox
while you are doing a superman seat grab

Non-Grab Hand: Hand which is not grabbing the airbox
hole and is stationary on the bars while the standard 
superman seat grab is being executed.

 
While the superman seat grab is being
executed, the hand that is still on the
handlebars is removed. The non grab hand is removed after
the grab hand is secured and as the legs are
being pushed away from the bike. Release of
the non- grab hand can start before the legs 
are all the way extended.  The idea is to have the non grab hand fully extended
(behind your back) at the same time that the grab hand is fully extended, thus 
pushing your body as far away from the bike as possible. The non-grab hand is
brought back to the handlebars as the body is being pulled back to the seat, but before the grab
hand is released to re-grab the handlebar.

Working Up to it...

While working up to the superman seat grab one
hander, you want to be careful and ease into
the hand-releasing process. If the hand is removed
to abruptly and you are not comfortable, you
may lose your control (or the bike)! The first
time the hand is removed, it should be a VERY
small motion. In fact, the hand should not be
moved far from the handlebars at all. The fingers
should be spread out, releasing the pressure from
the handlebar grip. Once you are comfortable
with the motion of releasing your control over
the handlebars, you may begin to pull your
hand away from the handlebars more and more
each time. At first it is best to position your hand above the handlebars when
 it is removed, as opposed to behind them.  Be sure to bring back your hand with
enough time left in the air to safely bring your other
hand and legs back onto the bike before landing.