pot shrinks the brain?

[dragonrider]

I thought it only blocked receptors in the neuron

Every time a bong clears, a brain cell gets its wings!

I was only joking about, "Smoking does kill brain cells, but only the weak ones... "

Let me explain. It's a joke because some people think smoking kills brain cells. So you take that idea and juxtapose it against the idea of Darwinian natural selection. You say it DOES kill brain cells, but ONLY THE WEAK ONES. So the implication is that it increases the overall health of the brain by weeding out the weak brain cells. See how funny that is now that we've dissected it? It's a joke! No? Still not funny? Well, nevermind then....