Chris Brown SNEAKS INTO JAIL!

Chris Brown pulled a fast one
Monday ... turning himself in at an
L.A. jail for his hit-and-run case -- a
day head of schedule.TMZ has
learned ... Brown showed up at the
Van Nuys jail at around 2 PM.  We're
told his lawyer, Mark Geragos,
engineered it all and the purpose was
to make it happen without any
photogs present.Brown was booked
and released on his own
recognizance -- no bail.  We're told
the whole thing took around 45
minutes.Now here's what's
interesting. Just a few hours earlier,
there was a gaggle of photogs at the
courthouse which is connected to the
jail, because 50 Cent made a court
appearance.  When the cameras were
gone, Chris appeared.Sneaky,
Geragos.