I'd be willing to bet a pint that your shift support rod (the one held in by a 10mm bolt) lost is bolt and fell off. Very simple fix, the bolt and plate are about £4.50 last time I checked up on it (a while ago) and install in about 15-20 seconds.
This happened to a friend's EG while spraying 150 shot racing a Cobra. Good times, we though he destroyed his tranny too. When we saw what it really was...well... :redface: