This happened.. northwest of Houston, sometime about a year or two ago.
The airplane belonged to National Aviation based out of Hooks (KDWH).
The "skydiver" was a non-current pilot who was a NASA employee
(contractor I believe) who was under investigation for possession of
stolen NASA computer equipment.

He approached National Aviation under the guise of wanting to get some
currency instructions and take pictures. As a result, the aircraft
climbed to a fairly high altitude (for a 152) and had the instructor in
the right seat performing a turn (i am assuming to the right, since the
instructor wasn't looking at his passenger. The passenger switched the
transponder to 7700 unseen, unbuckled his belt, unplugged his headset,
and did a head first dive out the door. I'm sure the intructor was
caught quite by surprise. The instructor then returned to Hooks.

The "skydivers" body was found a few days later when the vultures were
circling.

I have logged time in the accident airplane a few years before this, but
I didn't know the person(s) involved. I would say this wasn't so much a
case of "falling out" of a 152 as "diving out" of a 152.

Dave
Houston

Chris W wrote:
A friend of mine told me he was following this news story where 2 men
were flying in a 152 somewhere in Texas. While making a turn to the
right, the passenger fell out of the plane. This was a few days ago and
my friend hasn't heard any updates. Anyone here know about this and
heard anything else? The whole thing sounds a little fishy to me.