Yes: JFK-LAS the other week, someone in the cabin decided that V1 was the ideal time to get up and start fishing for something in the overhead.

As for embarrassing moments, I do remember on a packed overnight JFK-LHR sitting in xF and retrieving my amenity kit out of the overhead - the old style Club one - you remember, the zipper ones - the ones with a bit of substance. And corners. I manage to fumble this and drop it smack onto the face of the chap in xG, who was sound asleep wearing his eye mask and ear plugs. Thankfully no harm done, and I got away with a shaking of the head after a profuse apology.