There are two difficulties with his Honour's conclusion. First it does not
address the question of onus. It was incumbent upon the respondent to prove that
the action he took, which on his Honour's finding was consistent with a blow to
the face with a fist as described by the appellant, was necessary in order to defend
himself from the appellant's attack. His Honour's view that he was not satisfied
that the appellant's "injuries might not have been caused by some action taken by
the [respondent] in defence of himself' is only consistent with his having
assumed that the onus was upon the appellant to prove that more force than
necessary was used. Further, although his Honour had earlier recognised in his
judgment that, in the absence of evidence as to the force necessary to cause the
appellant's injuries, he would have to make his own assessment, he fails to
express his reasons for having come to the view which he did. For my part, I
cannot conceive how injuries, of the nature received did not involve considerable
force. In expressing that view, I am excluding, for the moment, the injury to the
arm, which almost undoubtedly was received when the appellant fell to the
ground. The evidence does not establish, in my view, that that degree of force was
necessary to fend off the appellant. Indeed, on the respondent's version, the only
force he needed to exert was to outstretch his hands to ward her off. In my
opinion, the respondent did not satisfy the onus upon him that the degree of force
was reasonable. Accordingly, I am of the opinion that the defence of self defence
should fail.