Chimping isn't a crime!
I was shooting away doing my thing as the Bride and Groom were entering the chapel when I took a quick glance down at my LCD screen for a quick check that everything was in order, only to notice my last few shots were horribly underexposed!
So I checked my settings to see what was wrong. ISO 400 fine, shutter speed 160/sec no problem there. Aperture f0.0??? whaaa?? It turns out the connectors between the Nikon D3 body and the 24-105mm f2.8 were not talking properly and thus the aperture in the Nikon lens was stuck in its fully stopped down position at f22 ahhhggg! Luckily I quickly noticed in time and gave the lens a quick wiggle to try and get it to connect properly again with the camera just in time to make the shots I needed from that scene.
Happy confident shooting! 8)