Section 322

if the hurt which he intends to cause, or knows himself to be likely to cause, is grievous hurt; and

if the hurt which he causes is grievous hurt.

is said to "voluntarily cause grievous hurt".

Explanation -

A person is not said to voluntarily cause grievous hurt except when he both causes grievous hurt and intends or knows himself to be likely to cause grievous hurt. But he is said voluntarily to cause grievous hurt, if, intending or knowing himself to be likely to cause grievous hurt of one kind, he actually causes grievous hurt of another kind.

Illustration

A, intending or knowing himself to be likely permanently to disfigure Z's face, gives Z a blow which does not permanently disfigure Z's face, but which causes Z to suffer severe bodily pain for the space of 20 days. A has voluntarily caused grievous hurt.