His tiger's blood wasn't the result of substance abuse!

Charlie Sheen made an appearance on the Late Show with David Letterman last night, and the veteran actor talked all about the circumstances that led up to his firing from Two and a Half Men and subsequent meltdown last year.

Asked by the talk show host if crack cocaine was to blame for his bizarre antics, the bad boy quipped, "I wish it was crack cocaine. I wish it was an ocean of vodka, a bathtub full of pills," adding, "It was just my brain was kind of separated into itself. I just had to take a stand for what I know was right."

So drugs played no part in all the drama?

"Not during the meltdown," he said. "During the previous 30 years of my life, sure."

His new show Anger Management has won Mr. Sheen rave reviews, so it seems as if things are finally on an upswing for Hollywood's favorite party boy!

Now he just needs to give up his nasty smoking habit!

charlie sheen jacket glasses cigarette smoking lunch