Somewhere between tool using
and CAVE painting...
The Big Bang Theory Season 1, Episode 11
Everyone hates the CAVE people.
Game of Thrones Season 3, Episode 2
I don't ever want to leave
this CAVE, Jon Snow.
Game of Thrones Season 3, Episode 5
to live in the Stone Age
and a CAVE wasn't available.
The Big Bang Theory Season 7, Episode 11
There's a CAVE painting in France
of one of my ancestors doing this:
The Big Bang Theory Season 4, Episode 23