We'd be fiddling, while drunk and hysterical, with the levers of the country's engine room. And we would make mistakes: long-term, core-function errors under impossibly volatile conditions. No matter how soothingly they suggest it, this is not something any rational person would want. The fact we are even talking about it suggests there is something deeply wrong with us.
http://www.politics.co.uk/blogs/2018/07/27/this-is-what-no-deal-brexit-actually-looks-like