Out of the box, ctrl-[ is mapped to escape. It took me about a week to un-learn Esc, but it is one of the better vim decisions I've made (along with mapping j t

Out of the box, ctrl-[ is mapped to escape. It took me about a week to un-learn Esc, but it is one of the better vim decisions I've made (along with mapping j to gj and k to gk, and mapping tab to :bnext).