Ketamine seems like a shitty drug. You are pretty much roofying yourself from what I understand.
Saliva is cool cause it really fucks you up. Unlike other drugs, I would never even think of driving on saliva cause you are not able to function on that stuff. Just to try tho, I don't think anyone would ever smoke that stuff regularly, at least not through a bong. If you smoke it through a pipe it's a lot less intense.