This is one of the best articles I've ever read on Wikipedia. 

It contains lots of sources about a "k hole" and reading it reminds me of previous experiences.  With other drug trips, it's usually always different.  With Ketamine, it's usually always the same.  A "k hole" is the only way to describe it.  And, since you have a major article on ketamine, describing it's main effect then warrants it's own article.  

I vote to keep this article.  Don't delete an article about talking with god