An actor is subject to liability to another for battery if
(a) he acts intending to cause a harmful or offensive contact with the person of the other or a third person, or an imminent apprehension of such a contact, and
(b) a harmful contact with the person of the other directly or indirectly results.
REST 2d TORTS § 13
As this court has held, consent is not effective as a defense to battery "where the beating is excessively disproportionate to the consent, given or implied, or where the party injured is exposed to loss of life or great bodily harm."
Davies v. Butler, 95 Nev. 763, 602 P.2d 605 (1979), quoting right v. Starr, 42 Nev. 441, 446, 179 P. 877 (1919).