When an object is resting on a surface, its weight W and the normal contact force N are equal in magnitude but opposite in direction. This misleads many students to mistake them as a action-reaction pair. This is actually quite an absurd mistake because W (gravitational pull) and N (electrical repulsion) are not even forces of the same nature.
In this comic, the panda and the goose are shocked by the DNA test results which showed them to be not biological twins. Haha.
xmComic 