I do not have a picture of it, but my worst bruising from biking came courtesy of a Canadian goose. I was riding on a trail when I saw the goose family - with little ones - near the trail side but there was a bike coming from the other way so I could not swing wide and one of the parents came at me (wow, are they big!) and plunked my right arm/shoulder with its chest. Somehow, I stayed upright, but by the time I got home, my arm from shoulder down was a very dark, scary-looking solid shade of purple.