[Walt's outright refusal strikes his interest. Wasn't self-experimentation a good method for someone so curious a scientist? And what exactly would he refuse to use?

He understands his caution, though. He just wouldn't inject himself with anything, either.]

Greater insight? Proof? I'm certain you know how LSD was discovered. Sometimes medications are discovered purely by accident.

[Don't medication and drugs do the same thing, in the end? They both affect nerve receptors, chemicals and other bodily functions.]