Real diving mishaps please

[Qix]

Good topic.  I'll bite first and swallow my pride to admit my dumb mistake.  This occurred a few years ago on a dive with Dan G and Jason Baker at Wazee.  I wasn't technically completely out of air so to speak, just didn't have my tank valve turned on all the way.  I turned on the tank while setting up my gear but didn't end up going in the water for another hour or so.  I must have turned the tank valve off for some reason but not off all the way.  When I was ready to get in the water I made the mistake of not checking the valve pre-dive.  Instead,  I just purged the reg and breathed off of it at the surface and confirmed the pressure gauge was reading fine and my reg was working fine.  It wasn't until I got down to about 130 feet that my reg started breathing really hard all of the sudden.  It wasn't gradual, it was instant.  I signaled OOA to Dan G and he donated me his primary on long hose, and we did a safe ascent to 100 feet.  Once there at the ascent line I put my reg back in and it was breathing fine and it then dawned on me what the problem was.  I wrote Jason Baker a note on my wetnotes to check my tank valve (I was diving a single 119 at the time and couldn't reach the valve by myself like I can in my doubles).  He confirmed that my valve was only on about 1/4 turn if that. Embarrassed  He wrote me a deserving note back which read STROKE!  Tongue Anyway...lesson learned.  There was no panic by myself or Dan in this incident.  I had practiced OOA drills several times prior to this incident so was prepared.
Also, I did get hung up a little in fishing line a couple times in Perch Lake and in Ore Be Gone.  Pretty easy to cut through it with the knife though.

I have to ask Lonnie, you never noticed your SPG needle bouncing as you took breaths? Or perhaps your descent was quick enough to be within your regular window of checking the SPG?