Coming off the freeway there are three lanes entering a 'T'
intersection: the leftmost one is left-turn only, the rightmost one is
right-turn-only, and vehicles in the middle one can turn left or
right.  To the left of the 'T' intersection is a short block ending in
a similar 'T' intersection, only the rightmost lane is closed for
construction, leaving one left-turn-only lane and one lane from which
you can turn either left or right.

Due to the lane closure, traffic in the center lane of the
cross-street was backed up to the intersection with the off-ramp.
However, the left-turn-only lane only had a few cars in it. Little
Miss MFFY in a silver 3-series with her dry cleaning hanging in the
back seat is in the middle lane at the off-ramp with her left signal
on. I'm in the left-turn-only lane at the off-ramp, second in line.

The light turns green. The car in front of me turns left into the
mostly-unoccupied left-turn-only lane on the cross street. Little Miss
MFFY, seeing that the middle lane was full of cars, enters the
intersection anyway and cuts across my bow into the left lane.

But she's not done yet.

Halfway down the (short) block, on comes her right turn signal, and
she begins slowing down, searching for a JLEDI who will let her into
the right lane so she can turn right. Eventually she found one. As I
flew past her, I gave her a nice big bouncing bird - she earned it!
One small consolation: I made the light; she did not.