quite a few dogs that did this through the cat flap. it was the nipping ones that could squeeze through, you really had to watch out!
the dog might seem to have its head stuck here, but the fact that it has holes in the bottom of the can means there is no vacuum to keep him in there, so with a simple pull he would be free to do it again and again.
of course, the dog is not really stuck like that, it is just being silly. but it was too much of a lovable face and squashed smile not to make it the top of this list. let us 