In Victoria BC at Fisherman's Wharf, you can buy fish pieces to feed the Harbour Seals and a few of the Western Gulls know that you're getting ready to hang a piece of fish out for the seals and setup at the top of the shack. As soon as my wife put her hand out with the fish, the gull swooped in and took fish right out of her hand... the next piece, she held on tighter, and the gull still won. She just had to learn to hold the fish differently, but those gulls learned pretty quick.
Recently here in Ottawa, I was about to take a bite out of my granola bar, and a white-breasted nuthatch came in at the same time for my bar. It swerved and landed very close. It was a very friendly nuthatch and came for sunflower seeds and such.