(a)Z is sitting in a moored boat on a river. A unfastens the moorings, and thus intentionally causes the boat to drift down the stream. Here A intentionally causes motion to Z, and he does this by disposing substances in such a manner that the motion is produced without any other act on any person’s part. A has therefore intentionally used force to Z; and if he has done so without Z’s consent, in order to the committing of any offence, or intending or knowing it to be likely that this use of force will cause injury, fear or annoyance to Z, A has used criminal force to Z.
