Programming under the influence

What are your thoughts on programming while buzzed, or maybe high on an illegal drug. Psychadelics and Cannabis are supposed to make your thoughts flow more freely which in theory would be an advantage while programming.

no xkcd references, please

With some drugs, you can't concentrate. With other drugs, you can't think laterally. There are plenty of others that do nothing for programming ability. Too much of stimulants and you'll feel like running a marathon rather than sitting to work. All in all, I tend to program sober.