High dose crystal methamphetamine causes me to go into one of several modes.
Mode One usually with a good, solid, moderate dose: Hyperactive, Productive, Talkative, Sociable, Clean your house, wash your car, highly sexual/have promiscuous sex for hours and hours and hours until the costco-sized bottle of lube runs out, fix things that aren't broken.
Mode Two usually with higher dosing: Anti-social, Paranoid, Introverted, watch/download porn, lazy, binge eating, mildly sociopathic, usually this all results in major anxiety/paranoia so I take a very strong benzodiazepine.
Mode Three with VERY high dosing: majorly sociopathic, kleptomaniac, delusional (think I'm invincible) start shit with people who "look at me wrong", get violent and end up getting taser'd or thorazined, usually both in that order, at an embarrassing and extremely public place, like the food court at your local mall. Because at this point, benzodiazepines probably could not slow me down, and would only further skew my judgement, potent anti-psychotics are a MUST. I recommend that EVERYONE have access to an antipsychotic of some kind prior to binging on methamphetamine.