>> we're talking about grandiose behavior. you think you're above it all. you're like god. this could easily be mania or hypermania where we have an alteration in someone's brain chemistry and that's causing them to act in a really bizarre way. >> reporter: he says sheen could have bipolar disorder. then again our expert said it could also be the drugs or both. >> when we see bee may have been orthat looks like this, it looks like, yes, possibly could be on a methamphetamine and possibly could be a methd-induced psychosis. usually that happens, though, over years and years of using and then you end up with this. >> you are nothing shy of traitors. your rational egos will be your downfall. mark this war lock's words. defeat is not an option. >> i'm concerned about the guy. if this is what it appears to me this guy is on the road to something really bad happening. >> i spoke with charlie sheen by phone today to react to the experts in that piece and he told me -- and i'm quoting here -- the only people who think i'm insane are the