Interview Idea

A coworker of mine was telling me about a company that always gave you an interview question in a language you didn't know.  It seems like a pretty good idea.  Its a nice way to level the playing field and see how good the candidate is at learning.  I was thinking of taking it to the next level and coding up a DSL to give interview questions in.  I am just a little worried that it might leave the candidate with a bad impression.  Any thoughts?

I've been meaning to play around with teh DSL tools in Vs for a while now.  This will give me a good opertunity.