I read a script of a doctor teaching an MMJ patient on how to smoke, and, he advised the patient to hold in the smoke for five seconds.

If you pull it in, and start counting to six, you'll feel your cannabinoid receptors, in your forebrain, activate. Good weed will hit you when you hit three. With regs, you'll feel it after you release it.

I wouldn't say, "hit it, slowly", it'd be "pull it slowly". Then hit it, and count to six.