I had a similar experience last year diving the Spiegle Grove...stayed too long at the Fair, and at my deep stop was passed by the Thundering Herd on their way up...fortunately I have clips on my Ike housing so I can clip it to BOTH my shoulder D-rings (diving a Hogarthian rig)...even with BOTH hands free it was an EXCITING situation to say the least...
Glad you made it up OK!
Norm