There were a few times I had my mind blown. Once with Scheme when I was watching the old SICP video lectures. But also (and this may be a rather unpopular thing

There were a few times I had my mind blown. Once with Scheme when I was watching the old SICP video lectures. But also (and this may be a rather unpopular thing to say) once with C when I had coded something up and compiled it and ran it and it finished instantly. Rust didn't really blow my mind, but I have taken some of its lessons (using error values, lifetime and ownership management) to heart. Common Lisp, which at the moment is the only language I can see myself using unless I decide to make one myself, never really blew my mind, although the little things it does make it hard for me to imagine switching away from it.