Well see, our uni has a lake in the middle, where some ducks live, and I think the other species is some kind of goose. We also had a normal-looking goose once, but it's disappeared now. Anyway, during the summer and nice, warm weather where you could sit outside and eat, people would do just that, particularly around the lake. So of course, the ducks became tame and used to us humans. They'd also get free food. But one day, it was really cold and wet and windy - terrible for sitting outside, so most people were up in The Plaza or in the cafeteria (huuuge - it's like a mini food court). Being the clever ducks they are, they hang around The Plaza in this kind of weather. I suppose on that day, some of them decided they weren't getting enough food out there, so they waddled through the doors and walked around the cafeteria for a while. It was brilliant ^^ I wish I could've taken photos though... Oh well.
My imaginary friend says you have serious mental problems.