No. If you are still conscious (it takes <30 seconds before losing consciousness) then you haven’t experienced sufficient oxygen deprivation to have severe permanent side effects. Brain death takes several minutes of sustained hypoxia. If you’re unconscious then obviously there’s no cancelling by your own will.

I think if you're still conscious enough to press a cancel button, you'd be OK in that regard (but I'm not an expert on the subject, to be sure).