He leans slightly to one side, and his head bobs.

Her melon-sized head bobs to the surface, and her left eye-octopuses have a dominant eye, as people have dominant hands-swivels in its socket to meet mine.

Males that encounter intruders in their territory will generally perform elaborate bodily displays, extending and recoiling the dewlap and performing various head bobs or pushups.

Lizards which have mobile dewlaps usually accompany their dewlap movement with head bobs and other displays.