I once watched a crow teasing a group of rabbits. It would creep up behind one and peck its bottom. The rabbit would leap straight up in the air in fright. It worked every time - peck, boing! Peck, boing! I can only guess the crow found it hilarious, I know I did. Now and then one of the rabbits would try to chase the crow away, equally funny to see.

Where I live there’s a blind turn and sometimes when I drive around it I come upon a bunch of crows standing in the middle of the road and they have to scatter to avoid being run over. There is never anything in the road there, so I assume they are playing chicken with cars.