I think the cops are at the door

From Wired:

In the January issue of Neuropharmacology, which happens to have a marijuana theme, two teams of researchers tried to explain what causes some people to feel paranoid when they smoke weed.

If you think it's impossible to have too much of a good thing -- think again.

In the first sentence of their research paper, a group of Italian scientists explained that low doses of tetrahydrocannabinol -- the psychoactive chemical in marijuana -- tend to be calming while large amounts have the opposite effect.