I have a 66 stang with a 302ci/T5.  I had started the car  and noticed
that the starter was still spinning after the car was running.  I turned
off the key, but it kept running.  After putting the car into 2nd gear
and stalling it out, I heard sizzling from the battery posts.  I opened
the hood, went for a wrench and disconnected the battery.

I disconnected the battery only after the starter engaged again and
pinned me against my garage door (parking brake not on), held me there
for a few seconds then released.  I pulled the neg cable off and now I
need to figure what went wrong.

Someone told me to disconnect the cable from the starter and turn on the
key to see if the solenoids rear small wire (I have two small wire lugs)
is sending juice (supplies a full 12v for starting to the coil?)  If it
he said it is the solenoid, if not suspect the ignition switch.  I have
an MSD setup, if it matters here.
I did replace the ignition switch about 3 years ago, but that doesn't
mean it is bad.  I suppose that it wouldn't be the starter itself, but
one of the switches.

I now call the car "Christine".....

Thanks,
Mike