oh yes....
10m on the Pins wreck in Strangford, appalling vis, pitch black. i'd arranged with my buddy beforehand to do gas-sharing drills, making a random unarranged signal during the dive. she got in first, and signalled she was OOG, i stared at her for several seconds thinking wtf does that signal mean, i've never seen it before... then it all clicked into place...
on the Laurentic i went after a lovely porcelain 'pull' from an old cludgy, the sort with a cistern at head-height, i spotted it between the beams squeezed down to get it. i was so chuffed. when i pulled it out of my pocket on the surface it had transformed into a lead fishing weight...
fast descends (CO2) and dark conditions/poor viz really gets me going.