It fell out of my pocket, somewhere between my table (at the beginning of the 'flag line'), the RSO station, and HP pad B. When I got to B, I had the 'oh s**t, no screwdriver' moment I tried retracing my steps several times during the day but no luck.
It is a 6" long, flat blade Stanley, mostly black handle with yellow trim, thin shank (maybe 1/8"). I am not overly attached to it but hope that a human and not a hay mowing machine finds it...
Thanks,
- Matt