That was always my intro to vi: I was (for example) doing a merge or something from git bash, then suddenly it dropped me into vi. I've made a few tries to learn vi, but I just don't edit text frequently enough to remember everything about it. I typically have to use Google to figure out how to exit it whenever some tool has it as the default and randomly drops me into it.

I remember a non-Linux friend of mine having a really poor introduction to Unix/Linux because he got bogged down in learning vi in addition to Unix's other foibles!