I think Panagiotis is going to love this:
“because the Java programming language and Java Virtual Machine are (surprise!) so tightlyCoupled, new language designers are compelled to make their languages such that they use only those features they can implement efficiently on the JVM. For example, implementations of Scheme for the JVM either lack call/cc or have a very slow and slightly buggy implementation of it. We call this the Gosling Tarpit.”
From Phosphorous, The Popular Lisp.
[via]
Managing organized complexity 
Hah!