A male will court a female by diving in front of her, cutting her off, shaking and shimmying until she agrees to spawn.
They scatter eggs among fine-leaved plants as well as directly on to the substrate during a characteristic, side-by-side, shimmying courtship ritual.
The undercarriage responded badly to this, the bogies shimmying uncontrollably.
Willis has made it clear that he was a problem child, regularly sneaking out of the house by shimmying down drain pipes.
Sam moves by shimmying horizontally across the grid and climbing upwards, once he has moved up a storey he can not climb back down.
